Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Summary of Outstanding Commitments to Extend Credit and Letters of Credit

The following table presents commitments to extend credit and letters of credit:

	2015		2014
	(in thousands)
Commercial and other	$	3,518,960	$	2,972,105
Home equity	1,300,062		1,291,596
Commercial mortgage and construction	965,116		558,662
Total commitments to extend credit	$	5,784,138	$	4,822,363
Standby letters of credit	$	374,729	$	382,465
Commercial letters of credit	39,529		32,304
Total letters of credit	$	414,258	$	414,769