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Shareholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2018
Stockholders' Equity Note [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | The changes in the components of AOCI, net of tax, were as follows:
| Foreign Currency Translation Adjustments |  | Net Unrealized Gain (Loss) on Derivative Instruments |  | Net Unrealized Gain (Loss) on Nonderivative Instruments |  | Pension Benefit Obligation Adjustments |  | Accumulated Other Comprehensive Income (Loss)
| (in thousands)
Balances at January 1, 2016 | $ | (158,009 | ) |  | $ | 318 |  |  | $ | (14,380 | ) |  | $ | (28,536 | ) |  | $ | (200,607 | )
OCI before reclassifications | (23,570 | ) |  | (1,087 | ) |  | — |  |  | (6,191 | ) |  | (30,848 | )
Amounts reclassified from AOCI | (1,407 | ) |  | 812 |  |  | — |  |  | 2,723 |  |  | 2,128 |
Total other comprehensive income (loss) | (24,977 | ) |  | (275 | ) |  | — |  |  | (3,468 | ) |  | (28,720 | )
Balances at December 31, 2016 | $ | (182,986 | ) |  | $ | 43 |  |  | $ | (14,380 | ) |  | $ | (32,004 | ) |  | $ | (229,327 | )
OCI before reclassifications | 53,854 |  |  | 360 |  |  | — |  |  | 2,354 |  |  | 56,568 |
Amounts reclassified from AOCI | 484 |  |  | 563 |  |  | — |  |  | 1,234 |  |  | 2,281 |
Total other comprehensive income (loss) | 54,338 |  |  | 923 |  |  | — |  |  | 3,588 |  |  | 58,849 |
Balances at December 31, 2017 | $ | (128,648 | ) |  | $ | 966 |  |  | $ | (14,380 | ) |  | $ | (28,416 | ) |  | $ | (170,478 | )
OCI before reclassifications | (28,841 | ) |  | 2,586 |  |  | — |  |  | 1,653 |  |  | (24,602 | )
Amounts reclassified from AOCI | — |  |  | (2,351 | ) |  | — |  |  | 1,126 |  |  | (1,225 | )
Total other comprehensive income (loss) | (28,841 | ) |  | 235 |  |  | — |  |  | 2,779 |  |  | (25,827 | )
Balances at December 31, 2018 | $ | (157,489 | ) |  | $ | 1,201 |  |  | $ | (14,380 | ) |  | $ | (25,637 | ) |  | $ | (196,305 | )
Income Tax (Provision) Benefit Related To OCI | The before-tax, income tax (provision) benefit, and net-of-tax amounts related to each component of OCI during the reporting periods were as follows:
| Year Ended December 31,
| 2018 |  | 2017 |  | 2016
| (in thousands)
Before-tax amount |
Foreign currency translation adjustment | $ | (29,130 | ) |  | $ | 54,218 |  |  | $ | (23,280 | )
Foreign currency translation adjustment reclassified into net income on disposal | — |  |  | 484 |  |  | (1,407 | )
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges | 2,908 |  |  | 585 |  |  | (1,768 | )
Net hedging (gain) loss reclassified to net income | (2,507 | ) |  | 916 |  |  | 1,322 |
Net unrealized gain (loss) on defined benefit plans | 2,343 |  |  | 3,401 |  |  | (6,256 | )
Net defined benefit plan loss reclassified to net income | 1,596 |  |  | 1,782 |  |  | 2,752 |
Total other comprehensive income (loss), before tax | (24,790 | ) |  | 61,386 |  |  | (28,637 | )
Tax (provision) benefit |  |  |  |  |
Foreign currency translation adjustment | 289 |  |  | (364 | ) |  | (290 | )
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges | (322 | ) |  | (225 | ) |  | 681 |
Net hedging (gain) loss reclassified into net income | 156 |  |  | (353 | ) |  | (510 | )
Net unrealized gain (loss) on defined benefit plans | (690 | ) |  | (1,047 | ) |  | 65 |
Net defined benefit plan loss reclassified to net income | (470 | ) |  | (548 | ) |  | (29 | )
Total other comprehensive income (loss) tax (provision) benefit | (1,037 | ) |  | (2,537 | ) |  | (83 | )
Net-of-tax amount |  |  |  |  |
Foreign currency translation adjustment | (28,841 | ) |  | 53,854 |  |  | (23,570 | )
Foreign currency translation adjustment reclassified into net income on disposal | — |  |  | 484 |  |  | (1,407 | )
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges | 2,586 |  |  | 360 |  |  | (1,087 | )
Net hedging (gain) loss reclassified into net income | (2,351 | ) |  | 563 |  |  | 812 |
Net unrealized gain (loss) on defined benefit plans | 1,653 |  |  | 2,354 |  |  | (6,191 | )
Net defined benefit plan loss reclassified to net income | 1,126 |  |  | 1,234 |  |  | 2,723 |
Total other comprehensive income (loss), net of tax | $ | (25,827 | ) |  | $ | 58,849 |  |  | $ | (28,720 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e526-108580 + Details
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