Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands		Mar. 31, 2016		Dec. 31, 2015		Mar. 31, 2015	[2]	Dec. 31, 2014	[2]
Current assets:
Cash and cash equivalents		$ 6,868	[1],[2]	$ 7,930	[1]	$ 11,408		$ 10,809
Accounts receivable, net of allowances of $14,154 and $14,026, respectively	[1]	258,797		260,029
Deferred income taxes	[1]	20,338		20,891
Income tax receivable	[1]	21,289		20,663
Prepaid expenses and other current assets	[1]	32,404		37,051
Total current assets	[1]	339,696		346,564
Property and equipment, net of accumulated depreciation of $71,528 and $64,780, respectively	[1]	193,540		195,364
Other assets:
Goodwill	[1]	683,379		682,810
Intangible assets, net	[1]	73,547		75,694
Other noncurrent assets	[1]	7,920		7,321
Total other assets	[1]	764,846		765,825
Total assets	[1]	1,298,082		1,307,753
Current liabilities:
Current maturities of debt	[1]	416,110		432,830
Accounts payable	[1]	125,242		116,166
Accrued expenses and other current liabilities	[1]	79,491		81,922
Total current liabilities	[1]	620,843		630,918
Long-term deferred tax liabilities		105,455		105,088
Other long-term liabilities	[1]	14,313		15,308
Total liabilities	[1]	740,611		751,314
Commitments and contingencies (Note 10)	[1]
Stockholders’ investment:
Common stock $.01 par value; 100,000 shares authorized; 38,318 and 38,266 shares issued and outstanding	[1]	383		383
Additional paid-in capital	[1]	397,385		397,253
Retained earnings	[1]	159,703		158,803
Total stockholders’ investment	[1]	557,471		556,439
Total liabilities and stockholders’ investment	[1]	$ 1,298,082		$ 1,307,753

[1] See Note 13 “Restatement of Previously Issued Financial Statements

[2] See Note 13 “Restatement of Previously Issued Financial Statements.”