v3.3.1.900
ACCUMULATED OTHER COMPREHENSIVE INCOME - Tax effectrs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Pre-Tax Amount      
Other comprehensive income (loss), before tax $ (16,458) $ (18,624) $ 30,292
Tax (Expense) Benefit      
Other comprehensive income (loss), tax 6,418 7,264 (15,532)
Net-of-Tax Amount      
Other comprehensive income (loss) (10,040) (11,360) 14,760
Foreign Currency      
Pre-Tax Amount      
Unrealized net holding gain (loss) arising during the period 2,250 1,603 179
Tax (Expense) Benefit      
Unrealized net holding gain (loss) arising during the period (878) (625)  
Net-of-Tax Amount      
Unrealized net holding gain (loss) arising during the period 1,372 978 179
Other comprehensive income (loss) 1,372 978  
Pension and other benefit adjustments, net gain or loss      
Pre-Tax Amount      
Unrealized net holding gain (loss) arising during the period 272 (22,202) 13,808
Less: reclassification adjustment for net gain (loss) realized in net earnings (2,752) (1,382)  
Other comprehensive income (loss), before tax     (78)
Tax (Expense) Benefit      
Unrealized net holding gain (loss) arising during the period (106) 8,659 (9,298)
Less: reclassification adjustment for net gain (loss) realized in net earnings 1,073 538  
Net-of-Tax Amount      
Unrealized net holding gain (loss) arising during the period 166 (13,543) 4,510
Less: reclassification adjustment for net gain (loss) realized in net earnings (1,679) (844)  
Other comprehensive income (loss)     (78)
Pension and other benefit adjustments, prior service credit      
Pre-Tax Amount      
Unrealized net holding gain (loss) arising during the period 1,223   15,197
Less: 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 (477)   (5,926)
Less: reclassification adjustment for net gain (loss) realized in net earnings 1,126 649  
Net-of-Tax Amount      
Unrealized net holding gain (loss) arising during the period 746   9,271
Less: reclassification adjustment for net gain (loss) realized in net earnings (1,762) (1,016)  
Pension and other benefit adjustments, curtailment      
Pre-Tax Amount      
Less: reclassification adjustment for net gain (loss) realized in net earnings (11,867)    
Tax (Expense) Benefit      
Less: reclassification adjustment for net gain (loss) realized in net earnings 4,628    
Net-of-Tax Amount      
Less: reclassification adjustment for net gain (loss) realized in net earnings (7,239)    
Pension and other benefit adjustments, settlement      
Pre-Tax Amount      
Less: reclassification adjustment for net gain (loss) realized in net earnings (321)    
Tax (Expense) Benefit      
Less: reclassification adjustment for net gain (loss) realized in net earnings 125    
Net-of-Tax Amount      
Less: reclassification adjustment for net gain (loss) realized in net earnings (196)    
Unrealized Gains on Marketable Securities (Recorded in Investment income)      
Pre-Tax Amount      
Unrealized net holding gain (loss) arising during the period (1,731) 4,305 (2,703)
Less: reclassification adjustment for net gain (loss) realized in net earnings (256) (52) 925
Tax (Expense) Benefit      
Unrealized net holding gain (loss) arising during the period 675 (1,678) 1,081
Less: reclassification adjustment for net gain (loss) realized in net earnings 100 21  
Net-of-Tax Amount      
Unrealized net holding gain (loss) arising during the period (1,056) 2,627 (1,622)
Less: reclassification adjustment for net gain (loss) realized in net earnings (156) (31) 925
Other comprehensive income (loss) (1,212) 2,596  
Unrealized Gain from Equity Method Investees' Cash Flow Hedge      
Pre-Tax Amount      
Unrealized net holding gain (loss) arising during the period (1,136) (96) 3,474
Less: reclassification adjustment for net gain (loss) realized in net earnings 748 865 (510)
Tax (Expense) Benefit      
Unrealized net holding gain (loss) arising during the period 443 37 (1,389)
Less: reclassification adjustment for net gain (loss) realized in net earnings (291) (337)  
Net-of-Tax Amount      
Unrealized net holding gain (loss) arising during the period (693) (59) 2,085
Less: reclassification adjustment for net gain (loss) realized in net earnings 457 528 $ (510)
Other comprehensive income (loss) $ (236) $ 469