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Share Based Compensation - Plans (Details) - USD ($) $ in Millions			12 Months Ended
	May 17, 2019	May 19, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share Based Compensation
Issued (in shares)			100,000
Forfeited (in shares)			100,000
Available for issuance (in shares)			2,200,000
Stock-based compensation expense			$ 13.4	$ 13.1	$ 12.9
Special Equity Plan
Share Based Compensation
Shares of common stock authorized for issuance under the share-based compensation plan		1,500,000
2019 Omnibus Incentive Plan
Share Based Compensation
Shares of common stock authorized for issuance under the share-based compensation plan	2,025,000		2,000,000
2016 Omnibus Incentive Plan
Share Based Compensation
Shares of common stock authorized for issuance under the share-based compensation plan			200,000
Additional shares authorized (in shares)	243,611
Stock Options \| Special Equity Plan
Share Based Compensation
Issued (in shares)		800,000
Performance-based stock awards \| Special Equity Plan
Share Based Compensation
Issued (in shares)		300,000