v3.7.0.1
ACCUMULATED OTHER COMPREHENSIVE INCOME - OCI and tax effects (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Pre-Tax Amount      
Other comprehensive income (loss), before tax $ (5,573) $ (16,458) $ (18,624)
Tax (Expense) Benefit      
Other comprehensive income (loss), tax 218 6,418 7,264
Net-of-Tax Amount      
Other comprehensive income (loss), net of tax (5,355) (10,040) (11,360)
Foreign Currency      
Pre-Tax Amount      
Unrealized net holding gain (loss) arising during the period (3,110) 2,250 1,603
Tax (Expense) Benefit      
Unrealized net holding gain (loss) arising during the period, tax (771) (878) (625)
Net-of-Tax Amount      
Unrealized net holding gain (loss) arising during the period, net of tax (3,881) 1,372 978
Other comprehensive income (loss), net of tax (3,881) 1,372  
Pension and Other Benefit Adjustments, Net Gain or Loss      
Pre-Tax Amount      
Unrealized net holding gain (loss) arising during the period (526) 272 (22,202)
Reclassification adjustment for net gain (loss) realized in net earnings 27 (2,752)  
Other comprehensive income (loss), before tax     (1,382)
Tax (Expense) Benefit      
Unrealized net holding gain (loss) arising during the period, tax 233 (106) 8,659
Reclassification adjustment for net gain (loss) realized in net earnings, tax (11) 1,073  
Other comprehensive income (loss), tax     538
Net-of-Tax Amount      
Unrealized net holding gain (loss) arising during the period, net of tax (293) 166 (13,543)
Reclassification adjustment for net gain (loss) realized in net earnings, net of tax 16 (1,679)  
Other comprehensive income (loss), net of tax     (844)
Pension and Other Benefit Adjustments, Prior Service Credit      
Pre-Tax Amount      
Unrealized net holding gain (loss) arising during the period   1,223  
Reclassification adjustment for net gain (loss) realized in net earnings   (2,888) (1,665)
Tax (Expense) Benefit      
Unrealized net holding gain (loss) arising during the period, tax   (477)  
Reclassification adjustment for net gain (loss) realized in net earnings, tax   1,126 649
Net-of-Tax Amount      
Unrealized net holding gain (loss) arising during the period, net of tax   746  
Reclassification adjustment for net gain (loss) realized in net earnings, net of tax   (1,762) (1,016)
Pension and Other Benefit Adjustments, Curtailment      
Pre-Tax Amount      
Reclassification adjustment for net gain (loss) realized in net earnings   (11,867)  
Tax (Expense) Benefit      
Reclassification adjustment for net gain (loss) realized in net earnings, tax   4,628  
Net-of-Tax Amount      
Reclassification adjustment for net gain (loss) realized in net earnings, net of tax   (7,239)  
Pension and Other Benefit Adjustments, Settlement      
Pre-Tax Amount      
Reclassification adjustment for net gain (loss) realized in net earnings (5) (321)  
Tax (Expense) Benefit      
Reclassification adjustment for net gain (loss) realized in net earnings, tax 2 125  
Net-of-Tax Amount      
Reclassification adjustment for net gain (loss) realized in net earnings, net of tax (3) (196)  
Unrealized Net Gain on Marketable Securities      
Pre-Tax Amount      
Unrealized net holding gain (loss) arising during the period 966 (1,731) 4,305
Reclassification adjustment for net gain (loss) realized in net earnings (2,977) (256) (52)
Tax (Expense) Benefit      
Unrealized net holding gain (loss) arising during the period, tax (377) 675 (1,678)
Reclassification adjustment for net gain (loss) realized in net earnings, tax 1,161 100 21
Net-of-Tax Amount      
Unrealized net holding gain (loss) arising during the period, net of tax 589 (1,056) 2,627
Reclassification adjustment for net gain (loss) realized in net earnings, net of tax (1,816) (156) (31)
Other comprehensive income (loss), net of tax (1,227) (1,212)  
Unrealized Net Gain from Equity Method Investees' Cash Flow Hedge      
Pre-Tax Amount      
Unrealized net holding gain (loss) arising during the period (507) (1,136) (96)
Reclassification adjustment for net gain (loss) realized in net earnings 559 748 865
Tax (Expense) Benefit      
Unrealized net holding gain (loss) arising during the period, tax 198 443 37
Reclassification adjustment for net gain (loss) realized in net earnings, tax (217) (291) (337)
Net-of-Tax Amount      
Unrealized net holding gain (loss) arising during the period, net of tax (309) (693) (59)
Reclassification adjustment for net gain (loss) realized in net earnings, net of tax 342 457 $ 528
Other comprehensive income (loss), net of tax $ 33 $ (236)