Stock Repurchase Program (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended		9 Months Ended
	Sep. 10, 2020	Dec. 05, 2019	Jun. 13, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Equity [Abstract]
Stock repurchase program, number of shares authorized to be repurchased (in shares)	5,000,000		4,000,000
Stock repurchase program, percent of common stock	4.30%		3.50%
Stock repurchase program, number of additional shares authorized to be repurchased (in shares)		3,000,000
Shares repurchased, number of shares (in shares)				624,932	2,478,400	4,081,132	2,742,300
Shares repurchased, value				$ 6,925	$ 38,217	$ 60,286	$ 42,084
Shares repurchased, price per share (in dollars per share)				$ 11.08	$ 15.42	$ 14.78	$ 15.35