Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassified actuarial net losses	$ (1,200)	$ (2,100)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	518,419	1,015,479
Ending Balance	462,154	518,419
Interest rate swaps | Cash Flow Hedging | Designated as Hedging Instrument
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassified amounts out of accumulated other comprehensive gain (loss)	2,400	1,000
Foreign currency contracts | Cash Flow Hedging | Designated as Hedging Instrument
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassified amounts out of accumulated other comprehensive gain (loss)	500	100
Retirement Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(8,146)	(12,066)
Other comprehensive income (loss) before reclassifications	(10,040)	3,207
Income tax	2,610	(834)
Other comprehensive income (loss) before reclassifications, net of tax	(7,430)	2,373
Amounts reclassified from accumulated other comprehensive income (loss)	1,196	2,090
Income tax	(311)	(543)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	885	1,547
Other comprehensive income (loss)	(6,545)	3,920
Ending Balance	(14,691)	(8,146)
Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(32,551)	(13,185)
Other comprehensive income (loss) before reclassifications	7,250	(19,366)
Income tax	0	0
Other comprehensive income (loss) before reclassifications, net of tax	7,250	(19,366)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Income tax	0	0
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	0	0
Other comprehensive income (loss)	7,250	(19,366)
Ending Balance	(25,301)	(32,551)
Derivatives and Other
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(4,915)	167
Other comprehensive income (loss) before reclassifications	(13,011)	(7,867)
Income tax	3,915	2,099
Other comprehensive income (loss) before reclassifications, net of tax	(9,096)	(5,768)
Amounts reclassified from accumulated other comprehensive income (loss)	1,906	954
Income tax	(610)	(268)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	1,296	686
Other comprehensive income (loss)	(7,800)	(5,082)
Ending Balance	(12,715)	(4,915)
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(45,612)	(25,084)
Other comprehensive income (loss) before reclassifications	(15,801)	(24,026)
Income tax	6,525	1,265
Other comprehensive income (loss) before reclassifications, net of tax	(9,276)	(22,761)
Amounts reclassified from accumulated other comprehensive income (loss)	3,102	3,044
Income tax	(921)	(811)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	2,181	2,233
Other comprehensive income (loss)	(7,095)	(20,528)
Ending Balance	$ (52,707)	$ (45,612)