Shareholders' Equity - Accumulated Other Comprehensive Loss (Details)	12 Months Ended
	Dec. 31, 2015 USD ($)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ (84,800,000)
Other comprehensive (loss) income before reclassifications, net of tax (1)	(10,400,000)	[1]
Amounts reclassified from accumulated other comprehensive loss, net of tax	(900,000)
Net current period other comprehensive income (loss)	(11,300,000)
Ending Balance	(96,100,000)
Tax on unrealized gains on derivative financial instruments	800,000
Liability adjustments for defined benefit plans	0
Accumulated foreign currency translation losses	76,000,000
Gains (Losses) on Derivative Financial Instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	5,100,000
Other comprehensive (loss) income before reclassifications, net of tax (1)	(1,400,000)	[1]
Amounts reclassified from accumulated other comprehensive loss, net of tax	(3,700,000)
Net current period other comprehensive income (loss)	(5,100,000)
Ending Balance	0
Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(20,600,000)
Other comprehensive (loss) income before reclassifications, net of tax (1)	(1,500,000)	[1]
Amounts reclassified from accumulated other comprehensive loss, net of tax	2,000,000
Net current period other comprehensive income (loss)	500,000
Ending Balance	(20,100,000)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(69,300,000)
Other comprehensive (loss) income before reclassifications, net of tax (1)	(7,500,000)	[1]
Amounts reclassified from accumulated other comprehensive loss, net of tax	800,000
Net current period other comprehensive income (loss)	(6,700,000)
Ending Balance	$ (76,000,000)

[1] Income tax benefit of $0.8 million was recorded for unrealized gains on derivative financial instruments and no income tax expense was recorded for liability adjustments for defined benefit plans for the year ended December 31, 2015.