Commitments and Letters of Credit (Tables)

12 Months Ended

Dec. 31, 2016

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:

	2016		2015
	(dollars in thousands)
Financial instruments whose contract amounts represent credit risk:
Commitments to extend credit	$	1,733,820	$	1,643,187
Financial standby letters of credit	18,108		17,843
Performance standby letters of credit	26,630		26,497
Commercial letters of credit	1,301		1,672