Recent Accounting Pronouncements (Details) $ in Millions	Dec. 31, 2016 USD ($)
Accounting Standards Update 2016-09 [Member]
Debt Instrument [Line Items]
Adjustment to deferred tax assets	$ 0.4
Retained Earnings [Member] | Accounting Standards Update 2016-09 [Member]
Debt Instrument [Line Items]
Cumulative-effect adjustment from adoption of accounting standard on stock-based compensation	0.4
Retained Earnings [Member] | Accounting Standards Update 2016-09, Forfeiture Rate Component [Member]
Debt Instrument [Line Items]
Cumulative-effect adjustment from adoption of accounting standard on stock-based compensation	(5.7)
Additional Paid-in Capital [Member] | Accounting Standards Update 2016-09, Forfeiture Rate Component [Member]
Debt Instrument [Line Items]
Cumulative-effect adjustment from adoption of accounting standard on stock-based compensation	$ 5.7