Commitments and Letters of Credit (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Notional Amount of Commitments and Letter of Credit Instruments

The following table identifies the notional amount of those instruments at December 31:

	2014		2013
	(dollars in thousands)
Financial instruments whose contract amounts represent credit risk:
Commitments to extend credit	$	1,635,948	$	1,571,987
Financial standby letters of credit	36,075		38,121
Performance standby letters of credit	25,915		32,441
Commercial letters of credit	2,611		—