Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Assets
Cash and cash equivalents	$ 285,159		$ 114,804
Restricted cash	55,762		62,341
Accounts receivable (less allowance for doubtful accounts of $15,315 and $14,256, respectively)	481,791		260,163
Securitized accounts receivable-restricted for securitization investors	280,000		144,000
Prepaid expenses and other current assets	15,416		33,191
Deferred income taxes	4,797		4,484
Total current assets	1,122,925		618,983
Property and equipment	93,380		83,013
Less accumulated depreciation and amortization	(60,656)		(56,195)
Net property and equipment	32,724		26,818
Goodwill	823,549		601,666
Other intangibles, net	299,460		193,861
Other assets	45,834		42,790
Total assets	2,324,492		1,484,118
Liabilities and stockholders' equity
Accounts payable	478,882		177,644
Accrued expenses	42,242		49,176
Customer deposits	180,269		78,685
Securitization facility	280,000	[1]	144,000	[1]
Current portion of notes payable and other obligations	140,354		11,617
Total current liabilities	1,121,747		461,122
Notes payable and other obligations, less current portion	278,429		313,796
Deferred income taxes	112,880		83,255
Total noncurrent liabilities	391,309		397,051
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.001 par value; 25,000,000 shares authorized and no shares issued and outstanding at December 31, 2011 and 2010
Common stock, $0.001 par value; 475,000,000 shares authorized, 113,741,883 shares issued and 81,860,213 shares outstanding at December 31, 2011; and 111,522,354 shares issued and 79,655,213 shares outstanding at December 31, 2010	114		112
Additional paid-in capital	466,203		421,991
Retained earnings	534,498		387,163
Accumulated other comprehensive loss	(13,716)		(8,101)
Less treasury stock (31,881,670 shares at December 31, 2011 and 31,867,141 shares at December 31, 2010)	(175,663)		(175,220)
Total stockholders' equity	811,436		625,945
Total liabilities and stockholders' equity	$ 2,324,492		$ 1,484,118

[1] The Company is party to a receivables purchase agreement (Securitization Facility) that was amended and restated for the fourth time as of October 29, 2007 and which has been amended seven times since then to add or remove purchasers, extend the facility termination date and remove all financial covenants. The current purchase limit under the securitization facility is $500 million. The facility was amended for the seventh time on February 6, 2012 to add a new purchaser and extend the facility termination date to February 4, 2013. There is a program fee equal to the Commercial Paper Rate of 0.34%, plus 0.90% as of December 31, 2011. The unused facility fee is payable at a rate of 0.50% per annum as of December 31, 2011. The Securitization Facility provides for certain termination events, which includes nonpayment, upon the occurrence of which the administrator may declare the facility termination date to have occurred, may exercise certain enforcement rights with respect to the receivables, and may appoint a successor servicer, among other things.