Basis of Presentation and Summary of Significant Accounting Policies - Share Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		1 Months Ended
	Nov. 15, 2018	Dec. 31, 2018	Nov. 13, 2018
Accounting Policies [Abstract]
Authorized amount repurchase of common stock			$ 50.0
Aggregate amount repurchased of outstanding common stock	$ 16.5
Completed common stock repurchase (in shares)		1.6
Average price per share (in dollars per share)		$ 10.62
Remaining authorized repurchase amount		$ 33.5