Reportable Segment Results (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Disclosure [Line Items]
Total Revenues	$ 182,068	$ 165,370
Operating Segments
Segment Reporting Disclosure [Line Items]
Total Revenues	182,068	165,370
Operating Interest Expense	1,288	1,147
Depreciation and Amortization	6,731	6,228
Pre-tax adjusted net income	64,946	62,875
Operating Segments | Fleet payment solutions
Segment Reporting Disclosure [Line Items]
Total Revenues	135,435	126,039
Operating Interest Expense	524	814
Depreciation and Amortization	6,377	5,736
Pre-tax adjusted net income	47,674	52,176
Operating Segments | Other payment solutions
Segment Reporting Disclosure [Line Items]
Total Revenues	46,633	39,331
Operating Interest Expense	764	333
Depreciation and Amortization	354	492
Pre-tax adjusted net income	$ 17,272	$ 10,699