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	1,048		1,048
Issuance of stock - employee stock purchase plan (shares)		4,202
Issuance/(cancellation) of non-vested stock	0	$ 0	0
Issuance/(cancellation) of non-vested stock (shares)		57,001
Exercise of stock options	364		364
Exercise of stock options (in shares)		7,422
Non-cash compensation	7,307		7,307
Surrendered Shares	(6,774)			(6,774)
Shares repurchased	(72,886)			(72,886)
Noncontrolling interest distribution	(518)					(518)
Net income	50,292				49,870	422
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
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	985		985
Issuance of stock - employee stock purchase plan (shares)		7,161
Issuance/(cancellation) of non-vested stock	0	$ 0	0
Issuance/(cancellation) of non-vested stock (shares)		80,494
Exercise of stock options	86		86
Exercise of stock options (in shares)		1,182
Non-cash compensation	7,347		7,347
Surrendered Shares	(4,682)			(4,682)
Noncontrolling interest contributions	9,552					9,552
Noncontrolling interest distribution	(672)					(672)
Net income	31,713				31,671	42
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