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Shareholders' Equity Other Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Mar. 31, 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 March 31,
| 2017 |  | 2016
| (in thousands)
Before-tax amount |  |  |
Foreign currency translation adjustment | $ | 15,066 |  |  | $ | 10,458 |
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges | 97 |  |  | (4,513 | )
Net hedging loss reclassified into net income | 378 |  |  | 286 |
Net unrealized gain (loss) on defined benefit plans | — |  |  | (113 | )
Net defined benefit plan gain (loss) reclassified to net income | 406 |  |  | (342 | )
Total other comprehensive income (loss), before tax | 15,947 |  |  | 5,776 |
Tax (provision) benefit |  |  |
Foreign currency translation adjustment | (50 | ) |  | (352 | )
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges | (37 | ) |  | 1,731 |
Net hedging loss reclassified into net income | (146 | ) |  | (110 | )
Net unrealized gain (loss) on defined benefit plans | — |  |  | 34 |
Net defined benefit plan gain (loss) reclassified to net income | (5 | ) |  | 103 |
Total other comprehensive income (loss) tax benefit | (238 | ) |  | 1,406 |
Net-of-tax amount |  |  |
Foreign currency translation adjustment | 15,016 |  |  | 10,106 |
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges | 60 |  |  | (2,782 | )
Net hedging loss reclassified into net income | 232 |  |  | 176 |
Net unrealized gain (loss) on defined benefit plans | — |  |  | (79 | )
Net defined benefit plan gain (loss) reclassified to net income | 401 |  |  | (239 | )
Total other comprehensive income (loss), net of tax | $ | 15,709 |  |  | $ | 7,182 |
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 | 10,106 |  |  | (2,782 | ) |  | — |  |  | (79 | ) |  | 7,245 |
Amounts reclassified from AOCI | — |  |  | 176 |  |  | — |  |  | (239 | ) |  | (63 | )
Total other comprehensive income (loss) | 10,106 |  |  | (2,606 | ) |  | — |  |  | (318 | ) |  | 7,182 |
Balances at March 31, 2016 | $ | (147,903 | ) |  | $ | (2,288 | ) |  | $ | (14,380 | ) |  | $ | (28,854 | ) |  | $ | (193,425 | )
Balances at January 1, 2017 | $ | (182,986 | ) |  | $ | 43 |  |  | $ | (14,380 | ) |  | $ | (32,004 | ) |  | $ | (229,327 | )
OCI before reclassifications | 15,016 |  |  | 60 |  |  | — |  |  | — |  |  | 15,076 |
Amounts reclassified from AOCI | — |  |  | 232 |  |  | — |  |  | 401 |  |  | 633 |
Total other comprehensive income (loss) | 15,016 |  |  | 292 |  |  | — |  |  | 401 |  |  | 15,709 |
Balances at March 31, 2017 | $ | (167,970 | ) |  | $ | 335 |  |  | $ | (14,380 | ) |  | $ | (31,603 | ) |  | $ | (213,618 | )

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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=66004124&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=66004124&loc=d3e526-108580 + Details
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