Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands		Dec. 31, 2014	Dec. 31, 2013
Cash and cash equivalents	[1]	$ 99,082	$ 17,128
Accounts receivable, net	[1]	121,799	105,167
Prepaid expenses	[1]	8,728	7,577
Inventories	[1]	3,162	2,674
Income taxes receivable	[1]	4,432	2,425
Deferred income taxes	[1]	1,771	3,932
Other	[1]	8,291	11,731
Property and equipment, net	[1]	269,570	239,237
Goodwill	[1]	476,559	579,875
Intangible assets, net	[1]	81,385	84,742
Other assets	[1]	47,184	49,969
Accounts payable	[1]	62,507	61,213
Accrued expenses	[1]	88,604	64,148
Income taxes payable	[1]	1,326	1,721
Current portion of long-term debt	[1]	26,350	17,536
Long-term debt, less current portion	[1]	940,771	974,130
Other long-term liabilities	[1]	$ 71,985	$ 53,348
Preferred stock par value	[1]	$ 0.001	$ 0.001
Preferred stock, Stated value (in dollars per share)	[1]	$ 1,000	$ 1,000
Preferred Stock, shares authorized (in shares)	[1]	3,500,000	0
Preferred stock, shares issued (in shares)	[1]	385,000	0
Preferred stock, shares outstanding (in shares)	[1]	385,000	0
Common stock, par value (in dollars per share)	[1]	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	[1]	1,000,000	1,028
Common stock, shares issued (in shares)	[1]	1,028	1,028
Common stock, shares outstanding (in shares)	[1]	1,028	1,028
Consolidated VIEs
Cash and cash equivalents	[1]	$ 7,202	$ 4,414
Accounts receivable, net	[1]	13,799	14,527
Prepaid expenses	[1]	651	628
Inventories	[1]	370	609
Income taxes receivable	[1]	0	0
Deferred income taxes	[1]	6	6
Other	[1]	403	47
Property and equipment, net	[1]	19,051	17,786
Goodwill	[1]	54,377	23,970
Intangible assets, net	[1]	12,421	3,319
Other assets	[1]	6,335	6,035
Accounts payable	[1]	1,270	1,469
Accrued expenses	[1]	3,534	4,692
Income taxes payable	[1]	0	90
Current portion of long-term debt	[1]	14	13
Long-term debt, less current portion	[1]	11	25
Other long-term liabilities	[1]	$ 2,474	$ 1,918

[1] As Restated