Quarterly Information (Tables)

12 Months Ended

Dec. 31, 2011

Quarterly Information [Abstract]

Schedule Of Quarterly Information

	Three Months Ended
	March 31		June 30		September 30		December 31
2011
Revenue	$	100,869	$	95,737	$	105,563	$	120,141
Gross profit		55,190		34,712		56,175		55,852
Net income		16,247		7,584		15,351		14,109
Net income per weighted average common share
Basic	$	0.60	$	0.28	$	0.56	$	0.52
Diluted	$	0.59	$	0.27	$	0.55	$	0.51
Dividends per common share	$	0.10	$	0.10	$	0.10	$	0.10
2010
Revenue	$	95,896	$	88,339	$	99,470	$	111,674
Gross profit		52,743		28,835		49,086		49,386
Net income		13,748		3,799		11,328		15,603
Net income per weighted average common share
Basic	$	0.52	$	0.14	$	0.42	$	0.58
Diluted	$	0.51	$	0.14	$	0.42	$	0.57
Dividends per common share	$	0.10	$	0.10	$	0.10	$	0.10