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Shareholders' Equity Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2017
Stockholders' Equity Note [Abstract] |
Total Comprehensive Income (Loss) [Table Text Block] | The before-tax amount, income tax (provision) benefit, and net-of-tax amount related to each component of OCI were as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
| (in thousands)
Before-tax amount |  |  |  |  |  |  |
Foreign currency translation adjustment | $ | 14,169 |  |  | $ | 9,128 |  |  | $ | 49,755 |  |  | $ | 12,856 |
Foreign currency translation adjustment reclassified into net income | 1,089 |  |  | — |  |  | 1,089 |  |  | (1,407 | )
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges | 57 |  |  | 602 |  |  | (480 | ) |  | (6,039 | )
Net hedging loss reclassified into net income | 148 |  |  | 279 |  |  | 785 |  |  | 845 |
Net defined benefit plan gain (loss) reclassified to net income | 447 |  |  | (1,725 | ) |  | 1,271 |  |  | (2,520 | )
Total other comprehensive income (loss), before tax | 15,910 |  |  | 8,284 |  |  | 52,420 |  |  | 3,735 |
Tax (provision) benefit |  |  |  |  |  |  |
Foreign currency translation adjustment | (328 | ) |  | 56 |  |  | (451 | ) |  | (539 | )
Foreign currency translation adjustment reclassified into net income | — |  |  | — |  |  | — |  |  | — |
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges | (22 | ) |  | (231 | ) |  | 185 |  |  | 2,330 |
Net hedging loss reclassified into net income | (57 | ) |  | (108 | ) |  | (303 | ) |  | (326 | )
Net defined benefit plan gain (loss) reclassified to net income | (37 | ) |  | 527 |  |  | (267 | ) |  | 713 |
Total other comprehensive income (loss) tax benefit | (444 | ) |  | 244 |  |  | (836 | ) |  | 2,178 |
Net-of-tax amount |  |  |  |  |  |  |
Foreign currency translation adjustment | 13,841 |  |  | 9,184 |  |  | 49,304 |  |  | 12,317 |
Foreign currency translation adjustment reclassified into net income | 1,089 |  |  | — |  |  | 1,089 |  |  | (1,407 | )
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges | 35 |  |  | 371 |  |  | (295 | ) |  | (3,709 | )
Net hedging loss reclassified into net income | 91 |  |  | 171 |  |  | 482 |  |  | 519 |
Net defined benefit plan gain (loss) reclassified to net income | 410 |  |  | (1,198 | ) |  | 1,004 |  |  | (1,807 | )
Total other comprehensive income (loss), net of tax | $ | 15,466 |  |  | $ | 8,528 |  |  | $ | 51,584 |  |  | $ | 5,913 |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | 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 |  | Total
| (in thousands)
Balances at January 1, 2016 | $ | (158,009 | ) |  | $ | 318 |  |  | $ | (14,380 | ) |  | $ | (28,536 | ) |  | $ | (200,607 | )
OCI before reclassifications | 12,317 |  |  | (3,709 | ) |  | — |  |  | (713 | ) |  | 7,895 |
Amounts reclassified from AOCI | (1,407 | ) |  | 519 |  |  | — |  |  | (1,094 | ) |  | (1,982 | )
Total other comprehensive income (loss) | 10,910 |  |  | (3,190 | ) |  | — |  |  | (1,807 | ) |  | 5,913 |
Balances at September 30, 2016 | $ | (147,099 | ) |  | $ | (2,872 | ) |  | $ | (14,380 | ) |  | $ | (30,343 | ) |  | $ | (194,694 | )
Balances at January 1, 2017 | $ | (182,986 | ) |  | $ | 43 |  |  | $ | (14,380 | ) |  | $ | (32,004 | ) |  | $ | (229,327 | )
OCI before reclassifications | 49,304 |  |  | (295 | ) |  | — |  |  | — |  |  | 49,009 |
Amounts reclassified from AOCI | 1,089 |  |  | 482 |  |  | — |  |  | 1,004 |  |  | 2,575 |
Total other comprehensive income (loss) | 50,393 |  |  | 187 |  |  | — |  |  | 1,004 |  |  | 51,584 |
Balances at September 30, 2017 | $ | (132,593 | ) |  | $ | 230 |  |  | $ | (14,380 | ) |  | $ | (31,000 | ) |  | $ | (177,743 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e526-108580 + Details
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