Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Paid-in Capital	Retained Earnings
Balance at Dec. 31, 2018	$ 249,443	$ 208	$ 0	$ 249,235
Balance (in shares) at Dec. 31, 2018		51,991
Net income	8,757			8,757
Stock options exercised and restricted stock awards granted	4,010	$ 1	4,009
Stock options exercised and restricted stock awards granted (in shares)		237
Share-based compensation	5,407		5,407
Stock repurchased and retired	(5,071)	$ (1)	(5,070)
Stock repurchased and retired (in shares)		(129)
Balance at Mar. 31, 2019	262,546	$ 208	4,346	257,992
Balance (in shares) at Mar. 31, 2019		52,099
Balance at Dec. 31, 2019	290,140	$ 208	3,631	286,301
Balance (in shares) at Dec. 31, 2019		52,079
Net income	21,853			21,853
Stock options exercised and restricted stock awards granted	4,497	$ 1	4,496
Stock options exercised and restricted stock awards granted (in shares)		212
Share-based compensation	2,351		2,351
Stock repurchased and retired	(12,518)	$ (1)	(10,478)	(2,039)
Stock repurchased and retired (in shares)		(247)
Balance at Mar. 31, 2020	$ 306,323	$ 208	$ 0	$ 306,115
Balance (in shares) at Mar. 31, 2020		52,044