Income Taxes Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Tax Credit Carryforward [Line Items]
Income tax credits	$ 31,900,000	$ 30,600,000
Net operating loss carryforwards	31,000,000	46,300,000
Valuation allowance	22,000,000	34,300,000
Undistributed earnings of foreign subsidiaries	815,000,000
Amount of unrecognized deferred tax liability, undistributed earnings of foreign subsidiaries	180,000,000
Income taxes paid	139,100,000	125,400,000	$ 127,200,000
Unrecognized tax benefits that would impact effective tax rate	16,900,000
Unrecognized tax benefits timing of deductibility unknown	800,000
Significant (increase) decrease in unrecognized tax benefits is reasonably possible, estimated range of change, upper bound	5,200,000.0
Unrecognized tax benefits, income tax penalties and interest expense	1,200,000	1,700,000	$ (200,000)
Unrecognized tax benefits, income tax penalties and interest accrued	4,100,000	$ 2,900,000
Federal, State, and Local
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards	31,000,000
Tax credit carryforward indefinitely
Tax Credit Carryforward [Line Items]
Income tax credits	10,500,000
Net operating loss carryforwards	8,600,000
Carryforward Subject To Expiration
Tax Credit Carryforward [Line Items]
Income tax credits	21,400,000
Net operating loss carryforwards	$ 22,400,000