Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Proceeds from issuance of warrants to purchase common stock			$ 0	$ 0	$ 207,514
Common shares outstanding	53,789,465	55,205,082	53,789,465	55,205,082
Number of shares authorized to be repurchased under stock repurchase program	4,000,000		4,000,000
Treasury stock, shares, acquired	1,301,612
Treasury stock acquired, average cost per share (in usd per share)	$ 13.65
Treasury stock, value, acquired, cost method	$ 17,800
Stock repurchase program, remaining number of shares authorized to be repurchased	2,698,388		2,698,388
Number of shares authorized to be sold under equity distribution agreement	8,000,000		8,000,000
Number of common shares issued under equity distribution agreement and outstanding as of period-end	3,242,364		3,242,364
Accumulated proceeds from issuance of common shares under equity distribution agreement	$ 61,200		$ 61,200
Shares sold at the market offering	0	0	0	0
Repurchased Shares From Employees
Class of Stock [Line Items]
Treasury stock, shares, acquired	0		115,053
Treasury stock, value, acquired, cost method			$ 1,200