Quarterly Financial Data -- Unaudited (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

Our quarterly results of operations are summarized below:

	For the Three Months Ended
	March 31			June 30			September 30			December 31
2014
Total revenue	$	997,711		$	1,035,345		$	1,057,087		$	1,090,952
Cost of services	$	(390,534	)	$	(393,185	)	$	(403,519	)	$	(421,098	)
Income from operations	$	247,407		$	284,578		$	294,028		$	293,657
Net income	$	93,988		$	119,961		$	136,170		$	143,122
Net income per common share--basic	$	0.02		$	0.02		$	0.02		$	0.03
Net income per common share--diluted (1)	$	0.02		$	0.02		$	0.02		$	0.03
2013
Total revenue	$	897,398		$	940,110		$	961,509		$	1,000,078
Cost of services	$	(330,257	)	$	(331,465	)	$	(336,464	)	$	(396,304	)
Income from operations	$	246,931		$	267,736		$	284,529		$	245,357
Net income	$	123,602		$	125,522		$	62,894		$	65,197
Net income per common share--basic	$	0.02		$	0.02		$	0.01		$	0.01
Net income per common share--diluted	$	0.02		$	0.02		$	0.01		$	0.01

(1) The sum of quarterly net income per share applicable to common stockholders (diluted) does not necessarily agree to the net income per share for the year due to the timing of common stock issuances.