CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock, Common	Retained Earnings [Member]
Balance at Dec. 31, 2021	$ (1,774)	$ 555	$ 109,179	$ (665,089)	$ 553,581
Balance (shares) at Dec. 31, 2021	55,489
Treasury Stock, Value, Acquired, Cost Method	$ (27,441)	0	0	27,441	0
Shares Issued, Value, Share-Based Payment Arrangement, before Forfeiture	0	0	(9,214)	10,365	(1,151)
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	9,846	0	9,575	271	0
Stockholders' Equity, Other	(782)	0	(513)	(269)	0
Dividends, Common Stock, Cash	(17,244)	0	0	0	17,244
Unrealized gain (loss) on marketable securities, net of tax	(92)	0	0	0	(92)
Net income	69,884	0	0	0	69,884
Balance at Mar. 31, 2022	$ 33,961	555	110,053	(681,625)	604,978
Balance (shares) at Mar. 31, 2022	55,489
Balance at Dec. 31, 2022	$ 81,275	555	151,144	(725,532)	655,108
Balance (shares) at Dec. 31, 2022	55,489
Treasury Stock, Value, Acquired, Cost Method	$ (34,622)	0	0	34,622	0
Shares Issued, Value, Share-Based Payment Arrangement, before Forfeiture	0	0	(21,103)	24,875	(3,772)
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	11,110	0	11,398	(288)	0
Stockholders' Equity, Other	(911)	0	(563)	(348)	0
Dividends, Common Stock, Cash	(19,896)	0	0	0	19,896
Unrealized gain (loss) on marketable securities, net of tax	59	0	0	0	59
Net income	94,595	0	0	0	94,595
Balance at Mar. 31, 2023	$ 133,432	$ 555	$ 142,002	$ (735,219)	$ 726,094
Balance (shares) at Mar. 31, 2023	55,489