Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Feb. 29, 2020
Share repurchase plan
Aggregate purchase price up to which shares can be acquired under share repurchase program			$ 25.0
Number of shares purchased under share repurchase program	461,831
Amount paid for shares purchased under share repurchase program	$ 7.4
Amount paid for shares purchased and cancelled under share repurchase program (per share)	$ 16.01
LTR Plan
Common Stock
Shares of common stock issued under the long-term incentive plan	34,524	114,106
Amount received in exchange for shares of common stock under a long term incentive plan	$ 0.6	$ 1.8
Percentage of average market closing prices used in determining number of common stock that could be purchased by participants	75.00%	75.00%
Equity Plan
Common Stock
Shares of common stock issued as a part of quarterly compensation of non-employee members of the Board of Directors	16,744	13,278
Accrued dividend equivalent units	2,401
Equity Plan | Restricted Stock Units
Common Stock
Granted, Units	607,361
Accrued dividend equivalent units	2,401