Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]

The tables below present the impact of these revisions, including the related tax effects, on additional previously-filed interim and year-end Consolidated Statements of Operations (i) for the three and six months ended June 30, 2014, (ii) for the three and nine months ended September 30, 2014, and (iii) for the three months and year ended December 31, 2014.

	Three Months Ended June 30, 2014							Six Months Ended June 30, 2014
	As Previously Reported		Adjustments			As Revised		As Previously Reported		Adjustments			As Revised
Selling, general, and administrative	$	102,414	$	(5,684	)	$	96,730	$	211,264	$	(11,307	)	$	199,957
Total operating expenses	443,294		(5,684		)	437,610		883,095		(11,307		)	871,788
Income from operations	222,406		5,684			228,090		408,345		11,307			419,652
Income before income taxes	203,119		5,684			208,803		378,382		11,307			389,689
Income tax expense	110,384		2,068			112,452		220,204		4,829			225,033
Net income	92,735		3,616			96,351		158,178		6,478			164,656
Net income per share - basic	$	0.92	$	0.04		$	0.96	$	1.58	$	0.07		$	1.65
Net income per share - diluted	$	0.82	$	0.03		$	0.85	$	1.40	$	0.06		$	1.46

	Three Months Ended September 30, 2014							Nine Months Ended September 30, 2014
	As Previously Reported		Adjustments			As Revised		As Previously Reported		Adjustments			As Revised
Selling, general, and administrative	$	149,748	$	(5,745	)	$	144,003	$	361,012	$	(17,052	)	$	343,960
Total operating expenses	543,069		(5,745		)	537,324		1,426,164		(17,052		)	1,409,112
Income from operations	182,719		5,745			188,464		591,064		17,052			608,116
Income before income taxes	176,078		5,745			181,823		554,460		17,052			571,512
Income tax expense	96,358		2,090			98,448		316,562		6,919			323,481
Net income	79,720		3,655			83,375		237,898		10,133			248,031
Net income per share - basic	$	0.79	$	0.04		$	0.83	$	2.37	$	0.10		$	2.47
Net income per share - diluted	$	0.70	$	0.03		$	0.73	$	2.10	$	0.09		$	2.19

	Three Months Ended December 31, 2014							Year Ended December 31, 2014
	As Previously Reported		Adjustments			As Revised		As Previously Reported		Adjustments			As Revised
Selling, general, and administrative	$	143,743	$	31,564		$	175,307	$	504,755	$	14,512		$	519,267
Total operating expenses	554,962		31,564			586,526		1,981,126		14,512			1,995,638
Income from operations	247,367		(31,564		)	215,803		838,431		(14,512		)	823,919
Income before income taxes	221,287		(31,564		)	189,723		775,747		(14,512		)	761,235
Income tax expense	111,111		(11,483		)	99,628		427,673		(4,564		)	423,109
Net income	110,176		(20,081		)	90,095		348,074		(9,948		)	338,126
Net income per share - basic	$	1.09	$	(0.20	)	$	0.89	$	3.46	$	(0.10	)	$	3.36
Net income per share - diluted	$	0.96	$	(0.18	)	$	0.78	$	3.07	$	(0.09	)	$	2.98

The table below presents the impact of these revisions, including the related tax effect, on the Company's previously-filed financial statements.

	December 31, 2014
	As Previously Reported			Adjustments			As Revised
Balance Sheet Data:
Deferred tax assets (noncurrent)	$	266,869		$	22,152		$	289,021
Total assets	3,871,827			22,152			3,893,979
Additional paid-in capital	2,404,118			60,890			2,465,008
Retained earnings	255,382			(38,738		)	216,644
Total stockholders' equity	2,542,325			22,152			2,564,477
Total liabilities and stockholders' equity	3,871,827			22,152			3,893,979
	Three Months Ended March 31, 2014
	As Previously Reported			Adjustments			As Revised
Consolidated Statement of Operations Data:
Selling, general, and administrative	$	108,850		$	(5,623	)	$	103,227
Total operating expenses	439,801			(5,623		)	434,178
Income from operations	185,939			5,623			191,562
Income before income taxes	175,263			5,623			180,886
Income tax expense	109,820			2,761			112,581
Net income	65,443			2,862			68,305
Net income per share - basic	$	0.66		$	0.03		$	0.69
Net income per share - diluted	$	0.58		$	0.03		$	0.61
Consolidated Statement of Cash Flows Data:
Cash flows from operating activities
Net income	$	65,443		$	2,862		$	68,305
Non-cash compensation expense	81,408			(5,623		)	75,785
Deferred taxes	(8,522		)	2,761			(5,761		)