Quarterly Financial Results (unaudited) (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Results (unaudited) [Abstract]

Schedule of Unaudited Quarterly Financial Results

The following table sets forth certain unaudited quarterly results of operations of the Company for the years ended December 31, 2012 and 2011. In the opinion of management, this information has been prepared on the same basis as the audited consolidated financial statements and all necessary adjustments, consisting only of normal recurring adjustments, have been included in the amounts below for a fair statement of the quarterly information when read in conjunction with the audited consolidated financial statements and related notes.

	For the Three Months Ended
	March 31, 2012		June 30, 2012		Sept. 30, 2012		Dec. 31, 2012
	(In thousands, except per share data)
Revenues	$	319,448	$	331,306	$	345,321	$	377,872
Cost of revenues	$	102,566	$	107,457	$	109,995	$	111,893
Net income	$	43,227	$	44,239	$	48,231	$	68,292
Basic net income per share	$	0.24	$	0.25	$	0.27	$	0.38
Diluted net income per share	$	0.24	$	0.24	$	0.27	$	0.38
Basic weighted average common shares	178,120		178,547		177,455		177,479
Diluted weighted average common shares	182,342		181,817		181,053		181,768

	For the Three Months Ended
	March 31, 2011		June 30, 2011		Sept. 30, 2011		Dec. 31, 2011
	(In thousands, except per share data)
Revenues	$	275,953	$	276,989	$	281,856	$	323,740
Cost of revenues	$	89,068	$	89,647	$	93,284	$	102,544
Net income	$	50,617	$	47,921	$	42,285	$	60,081
Basic net income per share	$	0.27	$	0.26	$	0.23	$	0.34
Diluted net income per share	$	0.26	$	0.25	$	0.23	$	0.33
Basic weighted average common shares	186,849		186,612		183,085		178,916
Diluted weighted average common shares	191,383		190,179		185,704		182,956