CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Statement - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Noncontrolling Interests
Balance, Stockholders Equity at Dec. 31, 2020	$ 810,741	$ 38	$ 698,287	$ (319,092)	$ 429,991	$ 1,517
Balance (in shares) at Dec. 31, 2020		37,470,212
Issuance of stock - employee stock purchase plan	1,961		1,961
Issuance of stock - employee stock purchase plan (shares)		8,262
Issuance/(cancellation) of non-vested stock	0	$ 0	0
Issuance/(cancellation) of non-vested stock (shares)		61,069
Exercise of stock options	623		623
Exercise of stock options (in shares)		13,812
Non-cash compensation	13,463		13,463
Surrendered Shares	(6,944)			(6,944)
Shares repurchased	(74,074)			(74,074)
Noncontrolling interest distributions	(794)					(794)
Net income (loss)	130,911				130,019	892
Balance, Stockholders Equity at Jun. 30, 2021	875,887	$ 38	714,334	(400,110)	560,010	1,615
Balance (in shares) at Jun. 30, 2021		37,553,355
Balance, Stockholders Equity at Mar. 31, 2021	789,574	$ 38	707,006	(398,752)	479,861	1,421
Balance (in shares) at Mar. 31, 2021		37,538,837
Issuance of stock - employee stock purchase plan	913		913
Issuance of stock - employee stock purchase plan (shares)		4,060
Issuance/(cancellation) of non-vested stock	0	$ 0	0
Issuance/(cancellation) of non-vested stock (shares)		4,068
Exercise of stock options	259		259
Exercise of stock options (in shares)		6,390
Non-cash compensation	6,156		6,156
Surrendered Shares	(170)			(170)
Shares repurchased	(1,188)			(1,188)
Noncontrolling interest distributions	(276)					(276)
Net income (loss)	80,619				80,149	470
Balance, Stockholders Equity at Jun. 30, 2021	875,887	$ 38	714,334	(400,110)	560,010	1,615
Balance (in shares) at Jun. 30, 2021		37,553,355
Balance, Stockholders Equity at Dec. 31, 2021	976,323	$ 38	728,118	(435,868)	639,063	44,972
Balance (in shares) at Dec. 31, 2021		37,674,868
Issuance of stock - employee stock purchase plan	1,891		1,891
Issuance of stock - employee stock purchase plan (shares)		13,345
Issuance/(cancellation) of non-vested stock	0	$ 0	0
Issuance/(cancellation) of non-vested stock (shares)		84,306
Exercise of stock options	772		772
Exercise of stock options (in shares)		7,723
Non-cash compensation	12,495		12,495
Surrendered Shares	(4,762)			(4,762)
Shares repurchased	(17,351)			(17,351)
Noncontrolling interest contributions	9,852					9,852
Noncontrolling interest distributions	(975)					(975)
Net income (loss)	60,750				61,250	(500)
Balance, Stockholders Equity at Jun. 30, 2022	1,038,995	$ 38	743,276	(457,981)	700,313	53,349
Balance (in shares) at Jun. 30, 2022		37,780,242
Balance, Stockholders Equity at Mar. 31, 2022	1,020,652	$ 38	736,536	(440,550)	670,734	53,894
Balance (in shares) at Mar. 31, 2022		37,763,705
Issuance of stock - employee stock purchase plan	906		906
Issuance of stock - employee stock purchase plan (shares)		6,184
Issuance/(cancellation) of non-vested stock	0	$ 0	0
Issuance/(cancellation) of non-vested stock (shares)		3,812
Exercise of stock options	686		686
Exercise of stock options (in shares)		6,541
Non-cash compensation	5,148		5,148
Surrendered Shares	(80)			(80)
Shares repurchased	(17,351)			(17,351)
Noncontrolling interest contributions	300					300
Noncontrolling interest distributions	(303)					(303)
Net income (loss)	29,037				29,579	(542)
Balance, Stockholders Equity at Jun. 30, 2022	$ 1,038,995	$ 38	$ 743,276	$ (457,981)	$ 700,313	$ 53,349
Balance (in shares) at Jun. 30, 2022		37,780,242