Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies [Abstract]

Summary of obligations

	December 31,
	2011		2010
Commitments to extend credit	$	4,189,421	$	912,206
Letters of credit		441,048		87,038

Future minimum lease payments for all non-cancelable capital and operating leases

	Captial Leases		Operating Leases
2012	$	60	$	12,944
2013		65		11,840
2014		9		11,230
2015		7		10,031
2016		1		9,145
Thereafter		14		62,462
Total minimum lease payments	$	156	$	117,652
Amounts representing interest		40
Present value of net minimum lease payments	$	116