Income Taxes - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Effective income tax rate	31.80%	31.80%	31.00%	26.00%
Federal statutory tax rate			35.00%
Tax credit carryforwards					$ 19.5
Liability for uncertain tax positions	$ 1.5		$ 1.5		1.4
Continuing Operations
Operating Loss Carryforwards [Line Items]
Liability for uncertain tax positions	0.3		0.3		0.3
Unrecognized tax positions to be released in the next 12 months	0.1		0.1
Discontinued Operations
Operating Loss Carryforwards [Line Items]
Liability for uncertain tax positions	1.2		1.2		1.1
Unrecognized tax positions to be released in the next 12 months	$ 1.2		$ 1.2
Foreign Income Tax Credit | Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards					$ 9.2
Tax credit carryforward expiration period			10 years
Tax credit carryforward expiration year			2020