Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Summary of Contractual Amounts for Unfunded Commitments and Letters of Credit

A summary of the contractual amounts for unfunded commitments and letters of credit are as follows: 

	December 31,
	2015		2014
	(in thousands)
Commitments to extend credit, including unsecured loan commitments of $341,374 at December 31, 2015 and $232,863 at December 31, 2014	$	3,624,578	$	2,164,523
Credit card commitments and financial guarantees	57,966		42,038
Standby letters of credit, including unsecured letters of credit of $4,257 at December 31, 2015 and $5,166 at December 31, 2014	50,659		49,556
Total	$	3,733,203	$	2,256,117

Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block]

			Amount of Commitment Expiration per Period
	Total Amounts Committed		Less Than 1 Year		1-3 Years		3-5 Years		After 5 Years
	(in thousands)
Commitments to extend credit	$	3,624,578	$	1,588,558	$	1,401,293	$	267,284	$	367,443
Credit card commitments and financial guarantees	57,966		57,966		—		—		—
Standby letters of credit	50,659		42,749		5,749		2,161		—
Total	$	3,733,203	$	1,689,273	$	1,407,042	$	269,445	$	367,443