Consolidated Statement Of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Balance, value at Dec. 31, 2013	$ 471,749	$ 311	$ 243,389	$ 236,449	$ (3,585)	$ (4,815)
Balance, shares at Dec. 31, 2013		31,131				395
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,345	0	0	4,345	0	0
Stock compensation expense	1,616	0	1,616	0	0	0
Excess tax benefit from stock compensation	81	0	81	0	0	0
Stock options exercised, shares		34				0
Stock options exercised, value	404	1	403	0	0	0
Issuance of restricted stock, shares		22				0
Issuance of restricted stock, value	0	0	0	0	0	0
Net settlement of restricted stock units, shares		103				22
Net settlement of restricted stock units, value	(408)	1	(1)	0	0	(408)
Total other comprehensive loss	(277)	0	0	0	(277)	0
Balance, value at Jun. 30, 2014	$ 477,510	$ 313	$ 245,488	$ 240,794	$ (3,862)	$ (5,223)
Balance, shares at Jun. 30, 2014		31,290				417