ACCUMULATED OTHER COMPREHENSIVE INCOME - Change in AOCI by component (Details) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Changes in accumulated other comprehensive income |
|
|
|
| Balance at the beginning of the period |
$ 1,538,703
|
$ 1,512,732
|
$ 1,507,470
|
| Other comprehensive income (loss), net of tax |
(5,355)
|
(10,040)
|
(11,360)
|
| Balance at the end of the period |
2,009,654
|
1,538,703
|
1,512,732
|
| Accumulated Other Comprehensive Income (Loss) |
|
|
|
| Changes in accumulated other comprehensive income |
|
|
|
| Balance at the beginning of the period |
2,804
|
12,844
|
24,204
|
| Other comprehensive income (loss) before reclassifications |
(3,601)
|
535
|
|
| Amounts reclassified from accumulated other comprehensive income |
(1,754)
|
(10,575)
|
|
| Other comprehensive income (loss), net of tax |
(5,355)
|
(10,040)
|
(11,360)
|
| Balance at the end of the period |
(2,551)
|
2,804
|
12,844
|
| Foreign Currency |
|
|
|
| Changes in accumulated other comprehensive income |
|
|
|
| Balance at the beginning of the period |
2,101
|
729
|
|
| Other comprehensive income (loss) before reclassifications |
(3,881)
|
1,372
|
978
|
| Other comprehensive income (loss), net of tax |
(3,881)
|
1,372
|
|
| Balance at the end of the period |
(1,780)
|
2,101
|
729
|
| Pension and Other Benefits |
|
|
|
| Changes in accumulated other comprehensive income |
|
|
|
| Balance at the beginning of the period |
(3,289)
|
6,675
|
|
| Other comprehensive income (loss) before reclassifications |
|
912
|
|
| Amounts reclassified from accumulated other comprehensive income |
(280)
|
(10,876)
|
|
| Other comprehensive income (loss), net of tax |
(280)
|
(9,964)
|
|
| Balance at the end of the period |
(3,569)
|
(3,289)
|
6,675
|
| Unrealized Net Gain on Marketable Securities |
|
|
|
| Changes in accumulated other comprehensive income |
|
|
|
| Balance at the beginning of the period |
1,465
|
2,677
|
|
| Other comprehensive income (loss) before reclassifications |
589
|
(1,056)
|
2,627
|
| Amounts reclassified from accumulated other comprehensive income |
(1,816)
|
(156)
|
(31)
|
| Other comprehensive income (loss), net of tax |
(1,227)
|
(1,212)
|
|
| Balance at the end of the period |
238
|
1,465
|
2,677
|
| Unrealized Net Gain from Equity Method Investees' Cash Flow Hedge |
|
|
|
| Changes in accumulated other comprehensive income |
|
|
|
| Balance at the beginning of the period |
2,527
|
2,763
|
|
| Other comprehensive income (loss) before reclassifications |
(309)
|
(693)
|
(59)
|
| Amounts reclassified from accumulated other comprehensive income |
342
|
457
|
528
|
| Other comprehensive income (loss), net of tax |
33
|
(236)
|
|
| Balance at the end of the period |
$ 2,560
|
$ 2,527
|
$ 2,763
|