CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2016	$ 459,740	$ 274	$ 345,138	$ 117,049	$ (2,721)
Balance (in shares) at Dec. 31, 2016		27,798,283
Increase (Decrease) in Stockholders' Equity
Net Income	60,100			60,100
Other comprehensive income (loss)	3,136				3,136
Share-based compensation expense	5,809		5,809
Issuance of restricted stock, net (in shares)		166,397
Issuance of common stock	709,377	$ 181	709,196
Issuance of common stock (in shares)		17,954,274
Goodwill adjustment	500		500
Restricted stock surrendered and canceled	(1,258)		(1,258)
Restricted stock surrendered and canceled (in shares)		(21,537)
Exercise of stock options, net	4,592	$ 3	4,589
Exercise of stock options (in shares)		347,633
Balance at Dec. 31, 2017	1,241,996	$ 458	1,063,974	177,149	415
Balance (in shares) at Dec. 31, 2017		46,245,050
Increase (Decrease) in Stockholders' Equity
Net Income	123,340			123,340
Other comprehensive income (loss)	(6,098)				(6,098)
Share-based compensation expense	9,033		9,033
Issuance of restricted stock, net	0
Issuance of restricted stock, net (in shares)		270,571
Issuance of common stock	601,171	$ 158	601,013
Issuance of common stock (in shares)		15,758,039
Restricted stock surrendered and canceled	(1,669)		(1,669)
Restricted stock surrendered and canceled (in shares)		(33,148)
Exercise of stock options, net	1,924	$ 1	1,923
Exercise of stock options (in shares)		240,243
Reclassification of certain tax effects of the Tax Cuts and Jobs Act	0			(82)	82
Balance at Dec. 31, 2018	$ 1,969,697	$ 617	1,674,274	300,407	(5,601)
Balance (in shares) at Dec. 31, 2018	62,480,755	62,480,755
Increase (Decrease) in Stockholders' Equity
Net Income	$ 159,718			159,718
Other comprehensive income (loss)	27,124				27,124
Share-based compensation expense	10,528		10,528
Issuance of restricted stock, net	0
Issuance of restricted stock, net (in shares)		316,754
Restricted stock surrendered and canceled	(3,285)		(3,285)
Restricted stock surrendered and canceled (in shares)		(139,569)
Repurchase and retirement of common stock	(100,000)	$ (33)	(89,887)	(10,080)
Repurchase of common stock (in shares)		(3,364,761)
Cash dividends declared ($0.88 per share)	(53,867)			(53,867)
Dividend equivalents declared ($0.88 per restricted stock units)	0		127	(127)
Exercise of stock options, net	2,679	$ 2	2,677
Exercise of stock options (in shares)		212,878
Balance at Dec. 31, 2019	$ 2,012,594	$ 586	$ 1,594,434	$ 396,051	$ 21,523
Balance (in shares) at Dec. 31, 2019	59,506,057	59,506,057