Other Comprehensive Income (Loss) - (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017		Sep. 30, 2016
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract]
Beginning Balance Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax			$ (12,120)		$ (12,370)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax			0		0
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax			(500)	[1]	(440)	[2]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax			500		440
Ending Balance Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	$ (11,620)	$ (11,930)	(11,620)		(11,930)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax [Abstract]
Beginning Balance Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax			(2,520)		(1,790)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax			(580)	[3]	(3,950)	[4]
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax			(3,100)	[1]	(290)	[2]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	2,540	630	2,520		(3,660)
Ending Balance Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	0	(5,450)	0		(5,450)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract]
Beginning Balance Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax			(9,760)		2,860
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax			4,640		(8,290)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment Realized upon Sale or Liquidation, Net of Tax			0		0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	910	(1,550)	4,640		(8,290)
Ending Balance Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(5,120)	(5,430)	(5,120)		(5,430)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning Balance Accumulated Other Comprehensive Income (Loss), Net of Tax			(24,400)		(11,300)
Other Comprehensive Income (Loss), Net Unrealized Gains (Losses) Arising During the Period, Net of Tax			4,060		(12,240)
Other Comprehensive income, Net Realized Gains (Losses) to Net Income			(3,600)		(730)
Total other comprehensive income (loss)	3,620	(780)	7,660		(11,510)
Ending Balance Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (16,740)	$ (22,810)	(16,740)		(22,810)
Other Comprehensive Income (Loss), Tax [Abstract]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax			400		2,400
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Tax			200		200
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax			$ 1,900		$ 200

[1] Defined benefit plans, net of income tax of approximately $0.2 million. See Note 13, "Defined Benefit Plans," for further details. Derivative instruments, net of income tax of approximately $1.9 million. See Note 8, "Derivative Instruments," for further details.

[2] Defined benefit plans, net of income tax of approximately $0.2 million. See Note 13, "Defined Benefit Plans," for further details. Derivative instruments, net of income tax of approximately $0.2 million. See Note 8, "Derivative Instruments," for further details.

[3] Derivative instruments, net of income tax of approximately $0.4 million. See Note 8, "Derivative Instruments," for further details.

[4] Derivative instruments, net of income tax of approximately $2.4 million. See Note 8, "Derivative Instruments," for further details.