CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - 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) Income [Member]
BALANCE at Dec. 31, 2012	$ 60,109	$ 29	$ 18,466	$ (636)	$ 42,254	$ (4)
BALANCE (in Shares) at Dec. 31, 2012		28,632
Net income	7,370	$ 0	0	0	7,370	0
Share-based compensation expense	5,832	$ 0	5,832	0	0	0
Share-based compensation expense (in Shares)		233
Exercise of stock options	0	$ 0	0	0	0	0
Exercise of stock options (in Shares)		1
Equity compensation awards, net	(203)	$ 0	(203)	0	0	0
Cash dividends	(20,013)	0	0	0	(20,013)	0
Employee tax withholdings related to the vesting of equity awards	(950)	0	0	(950)	0	0
Other comprehensive income (loss), net of tax	12	0	0	0	0	12
BALANCE at Dec. 31, 2013	52,157	$ 29	24,095	(1,586)	29,611	8
BALANCE (in Shares) at Dec. 31, 2013		28,866
Net income	19,311	$ 0	0	0	19,311	0
Share-based compensation expense	5,651	$ 0	5,651	0	0	0
Share-based compensation expense (in Shares)		92
Exercise of stock options	314	$ 0	314	0	0	0
Exercise of stock options (in Shares)		32
Equity compensation awards, net	(68)	$ 0	(68)	0	0	0
Cash dividends	(20,370)	0	0	0	(20,370)	0
Employee tax withholdings related to the vesting of equity awards	(1,476)	0	0	(1,476)	0	0
Other comprehensive income (loss), net of tax	(4)	0	0	0	0	(4)
BALANCE at Dec. 31, 2014	55,515	$ 29	29,992	(3,062)	28,552	4
BALANCE (in Shares) at Dec. 31, 2014		28,990
Net income	26,143	$ 0	0	0	26,143	0
Share-based compensation expense	5,468	$ 0	5,468	0	0	0
Share-based compensation expense (in Shares)		296
Exercise of stock options	3,182	$ 0	3,182	0	0	0
Exercise of stock options (in Shares)		335
Equity compensation awards, net	2,750	$ 0	2,750	0	0	0
Cash dividends	(20,504)	0	0	0	(20,504)	0
Employee tax withholdings related to the vesting of equity awards	(2,610)	0	0	(2,610)	0	0
Other comprehensive income (loss), net of tax	(16)	0	0	0	0	(16)
BALANCE at Dec. 31, 2015	$ 69,928	$ 29	$ 41,392	$ (5,672)	$ 34,191	$ (12)
BALANCE (in Shares) at Dec. 31, 2015		29,621