Quarterly Information (unaudited) (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

Our quarterly financial information has not been audited but, in management’s opinion, includes all adjustments necessary for a fair presentation.

(In thousands)	Three months ended								Year ended
2012	March 31		June 30		September 30		December 31		December 31
Revenue	$	93,605	$	102,311	$	99,671	$	105,985	$	401,572
Gross profit		15,612		19,005		17,929		19,425		71,971
Net income		4,384		5,984		6,183		6,137		22,688
Earnings per share:
Basic	$	0.23	$	0.32	$	0.33	$	0.32	$	1.20
Diluted	$	0.23	$	0.31	$	0.32	$	0.32	$	1.18
2011
Revenue	$	64,293	$	86,034	$	88,948	$	93,892	$	333,167
Gross profit		10,792		14,711		14,865		16,266		56,634
Net income		2,590		4,711		4,619		5,940		17,860
Earnings per share:
Basic	$	0.14	$	0.25	$	0.25	$	0.32	$	0.95
Diluted	$	0.14	$	0.25	$	0.24	$	0.31	$	0.94