Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Summary of Outstanding Commitments to Extend Credit and Letters of Credit

The outstanding amounts of commitments to extend credit and letters of credit were as follows:

	June 30, 2018		December 31, 2017
	(in thousands)
Commitments to extend credit	$	6,498,732	$	6,205,029
Standby letters of credit	321,372		326,973
Commercial letters of credit	42,018		41,801