Business Acquisitions - Additional Information (Detail) (USD $)	0 Months Ended
	Oct. 15, 2013	Mar. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Goodwill		$ 828,823,000	$ 819,892,000
Net Carrying Amount, Other Intangible Assets		201,737,000	206,744,000
Property, equipment and capitalized software (net of accumulated depreciation of $152,380 in 2014 and $145,400 in 2013)		76,920,000	72,275,000
FastCred [Member]
Business Acquisition [Line Items]
Payment to Acquire Businesses, Net of Cash Acquired	12,309,000
Goodwill			4,282,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		12,594,000
FastCred [Member] | Restatement Adjustment
Business Acquisition [Line Items]
Goodwill			1,490,000
Net Carrying Amount, Other Intangible Assets			(2,253,000)
Property, equipment and capitalized software (net of accumulated depreciation of $152,380 in 2014 and $145,400 in 2013)			(2,000)
Deferred income tax liabilities			$ (765,000)
FastCred [Member] | Customer relationships
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	4 years
FastCred [Member] | Acquired Software [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years