Stockholders' Equity and Equity Compensation Plans (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2014
Stockholders Equity And Equity Compensation Plans [Line Items]
Remaining number of shares available for repurchase	2,500,000		2,500,000
Repurchase of common stock for employee tax withholdings, shares	7,000	2,000	132,000	115,000
Repurchase of common stock for tax withholdings, value	$ 400	$ 100	$ 8,400	$ 5,500
Cash dividends declared per common share	$ 0.265	$ 0.25
Cash dividend	$ 8,400	$ 8,100	$ 25,400	24,500
Stock warrants term					10 years
Stock warrants, exercise price					$ 26.68
Performance based awards granted to executive management and certain key employees shares			121,000
Vesting maturity date			first quarter of 2024
Vesting period			2 years
Stock-based compensation expense	$ 8,700	$ 4,900	$ 20,778	$ 15,304
Market-based Awards
Stockholders Equity And Equity Compensation Plans [Line Items]
Awards vested			40,000
Restricted common stock
Stockholders Equity And Equity Compensation Plans [Line Items]
Vesting period			3 years
Awards vested	24,000		406,000
Comcast
Stockholders Equity And Equity Compensation Plans [Line Items]
Issuance of stock warrants					2,900,000
Stock warrants issued	1,000,000.0		1,000,000.0
Stock warrants vested			0
SEC Rule 10b5-1 Plan
Stockholders Equity And Equity Compensation Plans [Line Items]
Repurchase of common stock, shares	488,000	143,000	1,114,000	438,000
Total amount paid	$ 27,900	$ 6,700	$ 65,500	$ 20,100
Weighted-average price per share	$ 57.27	$ 46.66	$ 58.80	$ 46.04