CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Unaudited) - 3 months ended Mar. 31, 2017 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]
BALANCE at Dec. 31, 2016	$ 94,524	$ 30	$ 54,057	$ (8,329)	$ 48,799	$ (33)
BALANCE (in Shares) at Dec. 31, 2016	30,203	30,203
Net income	$ 7,484	$ 0	0	0	7,484	0
Share-based compensation expense	2,317	$ 0	2,317	0	0	0
Share-based compensation expense (in Shares)		165
Exercise of stock options	1,803	$ 0	1,803	0	0	0
Exercise of stock options (in Shares)		93
Purchase and retirement of common shares to satisfy employee tax withholdings	$ (785)	$ 0	0	0	(785)	0
Purchase and retirement of common shares to satisfy employee tax withholdings (in Shares)	(22)	(22)
Cash dividends	$ (5,318)	$ 0	0	0	(5,318)	0
Employee tax withholdings related to the vesting of equity awards	(1,330)	0	0	(1,330)	0	0
Other comprehensive loss, net of tax	(3)	0	0	0	0	(3)
BALANCE at Mar. 31, 2017	$ 98,692	$ 30	$ 58,177	$ (9,659)	$ 50,180	$ (36)
BALANCE (in Shares) at Mar. 31, 2017	30,439	30,439