Commitments and Contingencies - Additional Information (Detail)		12 Months Ended
	Oct. 26, 2015 USD ($)	Dec. 31, 2015 USD ($) site $ / shares shares	Dec. 31, 2014 USD ($) shares	Dec. 31, 2013 USD ($)	Aug. 21, 2007 shares
Conversion of Stock [Line Items]
Reserves to satisfy Federal regulatory requirements		$ 70,660,000	$ 57,616,000
Number of sites leased under non-cancelable operating leases | site		41
Rent expense under operating leases		$ 6,241,000	4,786,000	$ 4,300,000
Rent expense offset by rent income		$ 217,000	$ 225,000	$ 216,000
Commitment expiration date		One year or less or other termination clauses and may require payment of a fee.
Letters of credit, issue period		One year or less
Overdraft privilege receivable criteria		All holders of such accounts who bring their accounts to a positive balance at least once every thirty days receive the overdraft privilege.
Class B common stock of Visa Inc. | shares		22,775,173	22,714,964		15,814,662
Conversion ratio		1.648265
Damages awarded value	$ 250,000
Common Class B [Member]
Conversion of Stock [Line Items]
Class B common stock of Visa Inc. | shares		13,396
Common Class A [Member]
Conversion of Stock [Line Items]
The value of the Class A shares | $ / shares		$ 77.55
Value of unredeemed Class A equivalent shares		$ 1,712,000