Quarterly Financial Results (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2011

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

Unaudited quarterly data for the years ended December 31, 2011 and 2010 are as follows:

	December 31, 2011		September 30, 2011		June 30, 2011		March 31, 2011
Revenues	$	292,827	$	288,995	$	291,180	$	260,378
Gross Profit	64,057		61,132		60,107		55,201
Operating income	36,023		37,855		37,967		31,476
Net income applicable to common shares	$	7,797	$	17,549	$	30,301	$	19,373
Per basic common share(1):
Net income applicable to common shares	$	0.10	$	0.22	$	0.38	$	0.24
Per diluted common share(1):
Net income applicable to common shares	$	0.10	$	0.21	$	0.34	$	0.24

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(1) Per share computations include the impact of a 5% stock dividend paid on September 29, 2011. Quarterly basic and diluted net income per common share were computed independently for each quarter and do not necessarily total to the year to date basic and diluted net income per common share.

	December 31, 2010(1)		September 30, 2010(2)		June 30, 2010(3)		March 31, 2010
Revenues	$	277,618	$	295,124	$	268,460	$	222,087
Gross Profit	52,577		55,964		57,466		52,176
Operating income	29,342		29,876		21,077		31,018
Net income (loss) applicable to common shares	$	12,016	$	10,907	$	19,223	$	11,938
Per basic common share(4):
Net income applicable to common shares	$	0.15	$	0.14	$	0.24	$	0.15
Per diluted common share(4):
Net income applicable to common shares	$	0.15	$	0.14	$	0.18	$	0.13

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(1) Fourth quarter 2010 net income applicable to common shares includes litigation judgment expense of $1,800.

(2) Third quarter 2010 net income applicable to common shares includes $3,000 settlement charge.

(3) Second quarter 2010 net income applicable to common shares includes litigation judgment expense of $14,361.

(4) Per share computations include the impact of a 5% stock dividend paid on September 29, 2010. Quarterly basic and diluted net income per common share were computed independently for each quarter and do not necessarily total to the year to date basic and diluted net income per common share.