Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 292,905	$ 283,649
Restricted cash	48,474	53,674
Accounts receivable (less allowance for doubtful accounts of $20,240 and $19,463, respectively)	627,675	525,441
Securitized accounts receivable-restricted for securitization investors	402,000	298,000
Prepaid expenses and other current assets	27,122	28,126
Deferred income taxes	7,642	6,464
Total current assets	1,405,818	1,195,354
Property and equipment	101,373	93,902
Less accumulated depreciation and amortization	(54,719)	(48,706)
Net property and equipment	46,654	45,196
Goodwill	994,648	926,609
Other intangibles, net	515,702	463,864
Other assets	50,267	90,847
Total assets	3,013,089	2,721,870
Current liabilities:
Accounts payable	528,161	418,609
Accrued expenses	65,865	75,812
Customer deposits	158,459	187,627
Securitization facility	402,000	298,000
Current portion of notes payable and other obligations	146,091	162,174
Total current liabilities	1,300,576	1,142,222
Notes payable and other obligations, less current portion	485,997	485,217
Deferred income taxes	176,502	180,609
Total noncurrent liabilities	662,499	665,826
Commitments and contingencies (Note 11)
Stockholders' equity:
Common stock, $0.001 par value; 475,000,000 shares authorized, 117,444,296 shares issued and 81,709,804 shares outstanding at June 30, 2013; and 475,000,000 shares authorized, 116,772,324 shares issued and 81,037,832 shares outstanding at December 31, 2012	117	116
Additional paid-in capital	574,602	542,018
Retained earnings	888,458	750,697
Accumulated other comprehensive loss	(37,500)	(3,346)
Less treasury stock (35,734,492 shares at June 30, 2013 and December 31, 2012)	(375,663)	(375,663)
Total stockholders' equity	1,050,014	913,822
Total liabilities and stockholders' equity	$ 3,013,089	$ 2,721,870