Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies [Abstract]

Off-Balance Sheet Financial Instruments

	December 31,
(in thousands)	2018		2017
Commitments to extend credit	$	7,234,528	$	6,689,033
Letters of credit		365,498		348,377

Future Minimum Lease Payments for Non-Cancelable Operating Leases

(in thousands)	Operating Leases
2019	$	18,476
2020		17,059
2021		15,780
2022		15,506
2023		14,373
Thereafter		101,402
Total minimum lease payments	$	182,596