Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2013

Commitments and Contingencies Disclosure [Abstract]

Schedule of Commitments to Extend Credit

		September 30, 2013		December 31, 2012		September 30, 2012
Loan Commitments
	Commercial	$	3,521,227	$	2,431,023	$	2,406,226
	Consumer	2,057,115		1,720,518		1,687,955
	Total loan commitments	$	5,578,342	$	4,151,541	$	4,094,181

Schedule of Guarantor Obligations

		September 30, 2013		December 31, 2012		September 30, 2012
Financial guarantees
	Standby letters of credit	$	221,229	$	136,202	$	125,791
	Loans sold with recourse	50,882		42,383		39,251
	Total financial guarantees	$	272,111	$	178,585	$	165,042

Changes in Repurchase Reserve

Changes in the amount of the repurchase reserve for the three and nine months ended September 30, 2013 and 2012 are as follows:

	Three Months Ended September 30, 2013
	Reserve on residential mortgage loans			Reserve on manufactured housing loans		Total repurchase reserve
Balance at beginning of period	$	7,287		$	1,106	$	8,393
Assumed obligation	—			—		—
Net realized losses	(1,983		)	—		(1,983		)
Net increase (decrease) to reserve	2,546			3		2,549
Balance at end of period	$	7,850		$	1,109	$	8,959

	Three Months Ended September 30, 2012
	Reserve on residential mortgage loans			Reserve on manufactured housing loans			Total repurchased reserve
Balance at beginning of period	$	750		$	1,263		$	2,013
Net realized losses	(202		)	—			(202		)
Net increase (decrease) to reserve	552			(70		)	482
Balance at end of period	$	1,100		$	1,193		$	2,293

	Nine Months Ended September 30, 2013
	Reserve on residential mortgage loans			Reserve on manufactured housing loans			Total repurchased reserve
Balance at beginning of period	$	1,500		$	1,167		$	2,667
Assumed obligation	6,000			—			6,000
Net realized losses	(3,053		)	—			(3,053		)
Net increase (decrease) to reserve	3,403			(58		)	3,345
Balance at end of period	$	7,850		$	1,109		$	8,959

	Nine Months Ended September 30, 2012
	Reserve on residential mortgage loans			Reserve on manufactured housing loans			Total repurchased reserve
Balance at beginning of period	$	470		$	1,273		$	1,743
Net realized losses	(569		)	—			(569		)
Net increase (decrease) to reserve	1,199			(80		)	1,119
Balance at end of period	$	1,100		$	1,193		$	2,293