Discontinued Operations (Details) - USD ($) $ in Thousands			3 Months Ended		6 Months Ended
		Feb. 02, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014		Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses		$ 123,000
Gain (Loss) on Disposition of Business			$ 0	$ 0	$ 25,703	$ 0
Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation					14,400
Receivable in escrow			6,000		6,000
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents							$ (2,854)
Cash			41,863		41,863		28,860
Cash and cash equivalents			41,863	30,753	41,863	30,753	31,714	[1]	$ 37,350
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net							(21,615)
Accounts receivable, net			330,958		330,958		277,146
Disposal Group, Including Discontinued Operation, Prepaid and Other Assets							(1,205)
Prepaid expenses and income taxes			6,550		6,550		13,308
Disposal Group, Including Discontinued Operation, Deferred Tax Asset, Current							(3,321)
Deferred income tax assets			15,899		15,899		15,746
Workers' compensation receivable			13,664		13,664		13,370
Disposal Group, Including Discontinued Operations, Workers' Compensation and Medical Malpractice Receivable, Current							(5,358)
Other current assets			8,764		8,764		2,310	[2]
Disposal Group, Including Discontinued Operation, Other Assets, Current							0
Disposal Group, Including Discontinued Operation, Assets, Current			0		0		34,353
Assets, Current			417,698		417,698		385,093
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment							(2,508)
Property and equipment, net			51,728		51,728		44,311
Goodwill			878,862		878,862		512,060
Identifiable intangible assets, net			440,885		440,885		250,609
Disposal Group, Including Discontinued Operation, Intangible Assets							(11,960)
Disposal Group, Including Discontinued Operation, Goodwill							(58,637)
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent							(568)
Other non-current assets			7,961		7,961		5,160	[2]
Disposal Group, Including Discontinued Operation, Other Assets			0		0		73,673
Disposal Group, Including Discontinued Operation, Assets							0
Assets			1,797,134		1,797,134		1,270,906
Current portion of long-term debt, net			0		0		17,439	[2]
Disposal Group, Including Discontinued Operation, Accounts Payable							(951)
Accounts payable			7,960		7,960		7,925
Disposal Group, Including Discontinued Operation, Accrued Liabilities							(4,626)
Accrued payroll and contract professional pay			102,432		102,432		82,563
Disposal Group Workers' Compensation and Medical Malpractice Liability, Current							(13,571)
Workers’ compensation loss reserves			15,313		15,313		15,564
Income taxes payable			2,026		2,026		340
Disposal Group, Including Discontinued Operation, Other Liabilities, Current							(1,047)
Other current liabilities			43,416		43,416		20,729
Disposal Group, Including Discontinued Operation, Liabilities, Current			0		0		20,195
Liabilities, Current			171,147		171,147		164,755
Long-term debt, net			830,085		830,085		394,418	[2]
Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities, Noncurrent							(4,088)
Deferred income tax liabilities			65,712		65,712		63,821
Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent							(1,479)
Other long-term liabilities			5,094		5,094		7,937
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent			0		0		5,567
Disposal Group, Including Discontinued Operation, Liabilities							0
Liabilities			1,072,038		1,072,038		636,498
Cash Provided by (Used in) Operating Activities, Discontinued Operations					(1,778)	503
Cash received from sale of discontinued operations, net					115,440	0
Other Cash Provided by (Used in) Investing Activities, Discontinued Operations					14	159
Cash Provided by (Used in) Investing Activities, Discontinued Operations					115,426	(159)
Disposal Group, Including Discontinued Operation, Revenue			0	34,194	12,068	66,617
Disposal Group Including Discontinued Operations Cost of Services			0	23,342	8,653	46,421
Disposal Group, Including Discontinued Operation, Gross Profit (Loss)			0	10,852	3,415	20,196
Disposal Group, Including Discontinued Operation, General and Administrative Expense			152	8,213	2,793	16,358
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax			(152)	2,005	467	2,570
Discontinued Operation, Tax Effect of Discontinued Operation			(69)	857	141	1,110
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent			(83)	1,148	326	1,460
Disposal Group Including Discontinued Operations Amortization of Intangible Assets			$ 0	$ 634	$ 155	$ 1,268
Scenario, Previously Reported [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents							31,714
Accounts receivable, net							298,761
Prepaid expenses and income taxes							14,513
Deferred income tax assets							19,067
Workers' compensation receivable							18,728
Other current assets	[2]						2,310
Disposal Group, Including Discontinued Operation, Assets, Current							0
Assets, Current							385,093
Property and equipment, net							46,819
Goodwill							570,697
Identifiable intangible assets, net							262,569
Other non-current assets	[2]						5,728
Disposal Group, Including Discontinued Operation, Other Assets							0
Assets							1,270,906
Current portion of long-term debt, net	[2]						17,439
Accounts payable							8,876
Accrued payroll and contract professional pay							87,189
Workers’ compensation loss reserves							29,135
Income taxes payable							340
Other current liabilities							21,776
Disposal Group, Including Discontinued Operation, Liabilities, Current							0
Liabilities, Current							164,755
Long-term debt, net	[2]						394,418
Deferred income tax liabilities							67,909
Other long-term liabilities							9,416
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent							0
Liabilities							$ 636,498

[1] Cash and cash equivalents at December 31, 2014 include $2.9 million from the Physician Segment (see "Note 4. Discontinued Operations").

[2] The December 31, 2014 balances have been adjusted to reflect unamortized deferred loan costs attributable to term loans as a reduction of the related debt balances whereas they were previously included in other current assets and other non-current assets. This change in presentation was the result of early adopting ASU 2015-03. The December 31, 2014 balances for the current portion of long-term debt and long-term debt are now reflected net of $0.8 million and $2.5 million of unamortized deferred loan costs, respectively.