Changes in Accumulated Other Comprehensive Income (Loss) - Summary (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	$ 253,577	$ 318,420	$ 373,214	$ 318,420	$ 369,275
Other comprehensive income (loss)	4,064		1,106	(5,447)	304
Amounts reclassified from accumulated other comprehensive loss	397		19,159	728	19,374
Balance at end of period	253,262	253,577	387,105	253,262	387,105
Total Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(35,159)	(25,979)	(43,272)	(25,979)	(42,685)
Balance at end of period	(30,698)	(35,159)	(23,007)	(30,698)	(23,007)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(27,979)	(18,022)	(18,585)	(18,022)	(18,458)
Other comprehensive income (loss)	5,146		2,457	(4,811)	2,330
Amounts reclassified from accumulated other comprehensive loss	0		0	0	0
Balance at end of period	(22,833)	(27,979)	(16,128)	(22,833)	(16,128)
Defined Benefit Pension Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(2,749)	(3,080)	(22,038)	(3,080)	(22,253)
Other comprehensive income (loss)	0		0	0	0
Amounts reclassified from accumulated other comprehensive loss	0		19,159	331	19,374
Balance at end of period	(2,749)	(2,749)	(2,879)	(2,749)	(2,879)
Settlement reclassified from AOCI before tax		400	19,000
Tax benefit from settlement reclassified from AOCI		100			11,500
Loss reclassified from AOCI for defined benefit pension plans			100		400
Tax benefit reclassified from AOCI for defined benefit pension plans			100		100
Gains and Losses on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(4,431)	(4,877)	(2,649)	(4,877)	(1,974)
Other comprehensive income (loss)	(1,082)		(1,351)	(636)	(2,026)
Amounts reclassified from accumulated other comprehensive loss	397		0	397	0
Balance at end of period	(5,116)	$ (4,431)	$ (4,000)	(5,116)	$ (4,000)
Impact of de-designation of interest rate swap agreement	500			500
Tax benefit from de-designation of interest rate swap agreement	$ 100			$ 100