Stockholders' Equity (Details) - USD ($) $ in Millions	Dec. 31, 2019	Oct. 31, 2008
Summary of Stockholders' Equity Disclosure [Line Items]
Preferred stock authorized (in shares)	25,000,000
Preferred stock issued (in shares)	0
Preferred stock outstanding (in shares)	0
Stock Repurchase Program, Authorized Amount		$ 150.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 125.6
Minimum [Member] | Revolving Credit Facility [Member]
Summary of Stockholders' Equity Disclosure [Line Items]
Amount Of Threshold Under Credit Facility, Dividend Restriction, Unlimited	20.00%
Amount Of Threshold Under Credit Facility, Dividend Restriction, Unlimited with Financial Covenant Compliance	15.00%
Maximum [Member] | Revolving Credit Facility [Member]
Summary of Stockholders' Equity Disclosure [Line Items]
Annual Dividend Restriction Monetary Limit	$ 18.0
Annual Dividend Restriction Rate Limit	0.50%
Aggregate Dividend Restriction Monetary Limit	$ 25.0
Aggregate Dividend Restriction Rate Limit	0.70%