Stockholders' Equity - Additional Information (Details) - USD ($)	3 Months Ended					9 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Mar. 13, 2020	Nov. 30, 2014
Dividends Payable [Line Items]
Cash dividends declared per common share (usd per share)		$ 0.09	$ 0.09	$ 0.09	$ 0.08	$ 0.27	$ 0.24
Cash dividends paid to stockholders		$ 5,500,000	$ 5,500,000	$ 5,500,000	$ 4,800,000	$ 16,500,000	$ 14,500,000
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased		82,754			7,227	87,754	498,217
Treasury stock purchases		$ 3,200,000			$ 200,000	$ 3,400,000	$ 13,700,000
Subsequent Event
Dividends Payable [Line Items]
Cash dividends declared per common share (usd per share)	$ 0.09
November 2014 Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount									$ 75,000,000
March 2020 Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount								$ 75,000,000