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Shareholders' Equity | 12 Months Ended
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Dec. 31, 2020
Stockholders' Equity Note [Abstract] |
Rollforward Of Accumulated Other Comprehensive Income [Table Text Block] |
| Currency Translation Adjustment, Net of Tax |  | Net Unrealized Gain (Loss) on Cash Flow Hedging Arrangements, Net of Tax |  | Pension and Post-Retirement Benefit Related Items, Net of Tax |  | Total
Balance at December 31, 2017 | $ | (31,340) |  |  | $ | (1,081) |  |  | $ | (232,985) |  |  | $ | (265,406) |
Other comprehensive income (loss), net of tax: |  |  |  |  |  |  |
Net unrealized actuarial gains (loss), prior service costs, and plan amendments | — |  |  | — |  |  | (24,106) |  |  | (24,106) |
Net unrealized gains (loss) on cash flow hedging arrangements | — |  |  | (658) |  |  | — |  |  | (658) |
Foreign currency translation adjustment | (32,573) |  |  | — |  |  | 3,522 |  |  | (29,051) |
Amounts recognized from accumulated other comprehensive income (loss), net of tax | — |  |  | 2,441 |  |  | 14,366 |  |  | 16,807 |
Net change in other comprehensive income (loss), net of tax | (32,573) |  |  | 1,783 |  |  | (6,218) |  |  | (37,008) |
Balance at December 31, 2018 | $ | (63,913) |  |  | $ | 702 |  |  | $ | (239,203) |  |  | $ | (302,414) |
Other comprehensive income (loss), net of tax: |  |  |  |  |  |  |
Net unrealized actuarial gains (loss), prior service costs, and plan amendments | — |  |  | — |  |  | (32,269) |  |  | (32,269) |
Net unrealized gains (loss) on cash flow hedging arrangements | — |  |  | (1,063) |  |  | — |  |  | (1,063) |
Foreign currency translation adjustment | 2,898 |  |  | — |  |  | (2,108) |  |  | 790 |
Amounts recognized from accumulated other comprehensive income (loss), net of tax | — |  |  | (861) |  |  | 12,144 |  |  | 11,283 |
Net change in other comprehensive income (loss), net of tax | 2,898 |  |  | (1,924) |  |  | (22,233) |  |  | (21,259) |
Balance at December 31, 2019 | $ | (61,015) |  |  | $ | (1,222) |  |  | $ | (261,436) |  |  | $ | (323,673) |
Other comprehensive income (loss), net of tax: |  |  |  |  |  |  |
Net unrealized actuarial gains (loss), prior service costs, and plan amendments | — |  |  | — |  |  | (35,755) |  |  | (35,755) |
Net unrealized gains (loss) on cash flow hedging arrangements | — |  |  | (11,323) |  |  | — |  |  | (11,323) |
Foreign currency translation adjustment | 29,914 |  |  | — |  |  | (19,701) |  |  | 10,213 |
Amounts recognized from accumulated other comprehensive income (loss), net of tax | — |  |  | 11,066 |  |  | 14,547 |  |  | 25,613 |
Net change in other comprehensive income (loss), net of tax | 29,914 |  |  | (257) |  |  | (40,909) |  |  | (11,252) |
Balance at December 31, 2020 | $ | (31,101) |  |  | $ | (1,479) |  |  | $ | (302,345) |  |  | $ | (334,925) |
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] |
|  | 2020 |  | 2019 |  | 2018 |  | Location of Amounts Recognized in Earnings
Effective portion of losses (gains) on cash flow hedging arrangements: |  |  |  |  |  |  |  |
Interest rate swap agreements |  | $ | 2,413 |  |  | $ | 109 |  |  | $ | 539 |  |  | Interest expense
Cross currency swap |  | 11,531 |  |  | (1,022) |  |  | 2,212 |  |  | (a)
Total before taxes |  | 13,944 |  |  | (913) |  |  | 2,751 |  |  |
Provision for taxes |  | 2,878 |  |  | (52) |  |  | 310 |  |  | Provision for taxes
Total, net of taxes |  | $ | 11,066 |  |  | $ | (861) |  |  | $ | 2,441 |  |  |
Recognition of defined benefit pension and post-retirement items: |  |  |  |  |  |  |  |
Recognition of actuarial losses, plan amendments, prior service cost, and settlement charge before taxes |  | $ | 18,609 |  |  | $ | 15,467 |  |  | $ | 18,756 |  |  | (b)
Provision for taxes |  | 4,062 |  |  | 3,323 |  |  | 4,390 |  |  | Provision for taxes
Total, net of taxes |  | $ | 14,547 |  |  | $ | 12,144 |  |  | $ | 14,366 |  |  |

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