Summary of Significant Accounting Policies Schedule of Revisions and Reclassifications - Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets	$ 1,128	$ 30,282
Assets, Current	396,856	379,096
Goodwill	1,810,853	1,825,721
Total assets	11,923,644	12,833,600
Current maturities of long-term debt	90,931	176,362
Income taxes	8,035	5,263
Liabilities, Current	552,008	673,582
Long-term Debt and Capital Lease Obligations	2,963,794	3,125,548
Deferred tax liabilities	448,824	387,169
Other liabilities	495,565	491,238
Accumulated deficit	(81,859)	(90,026)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,377,378	1,480,228	1,415,193	1,463,262
Liabilities and Equity	11,923,644	12,833,600
Financials as previously reported [Member]
Deferred tax assets		39,074
Assets, Current		393,747
Goodwill		1,922,102
Total assets		12,906,070
Current maturities of long-term debt		146,362
Income taxes		6,391
Liabilities, Current		642,584
Long-term Debt and Capital Lease Obligations		3,155,548
Deferred tax liabilities		619,200
Other liabilities		430,393
Accumulated deficit		(145,876)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		1,424,378
Liabilities and Equity		12,906,070
Restatement Adjustment [Member]
Deferred tax assets		(3,750)
Assets, Current		(3,750)
Goodwill		(91,016)
Total assets		(94,766)
Current maturities of long-term debt		30,000
Income taxes		(1,202)
Liabilities, Current		28,798
Long-term Debt and Capital Lease Obligations		(30,000)
Deferred tax liabilities		(190,355)
Other liabilities		40,941
Accumulated deficit		55,850
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		55,850
Liabilities and Equity		(94,766)
Reclassifications for purchase price adjustments and discontinued operations [Member]
Deferred tax assets		(5,042)
Assets, Current		(10,901)
Goodwill		(5,365)
Total assets		22,296
Current maturities of long-term debt		0
Income taxes		74
Liabilities, Current		2,200
Long-term Debt and Capital Lease Obligations		0
Deferred tax liabilities		(41,676)
Other liabilities		19,904
Accumulated deficit		0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		0
Liabilities and Equity		22,296
Financials as adjusted [Domain]
Deferred tax assets		30,282
Assets, Current		379,096
Goodwill		1,825,721
Total assets		12,833,600
Current maturities of long-term debt		176,362
Income taxes		5,263
Liabilities, Current		673,582
Long-term Debt and Capital Lease Obligations		3,125,548
Deferred tax liabilities		387,169
Other liabilities		491,238
Accumulated deficit		(90,026)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		1,480,228
Liabilities and Equity		$ 12,833,600