Short-Term Borrowings (Tables)

12 Months Ended

Dec. 31, 2017

Short-Term Borrowings [Abstract]

Short-Term Borrowings

	December 31,
(in thousands)	2017		2016
Federal funds purchased:
Amount outstanding at period end	$	140,754	$	2,275
Average amount outstanding during period		27,063		14,052
Maximum amount at any month end during period		140,754		59,475
Weighted-average interest at period end		1.00%		0.38%
Weighted-average interest rate during period		1.37%		0.50%
Securities sold under agreements to repurchase:
Amount outstanding at period end	$	430,569	$	358,131
Average amount outstanding during period		501,719		454,571
Maximum amount at any month end during period		587,569		579,099
Weighted-average interest at period end		0.17%		0.04%
Weighted-average interest rate during period		0.12%		0.03%
FHLB borrowings:
Amount outstanding at period end	$	1,132,567	$	865,000
Average amount outstanding during period		1,478,114		943,570
Maximum amount at any month end during period		2,061,652		1,175,000
Weighted-average interest at period end		1.35%		0.54%
Weighted-average interest rate during period		1.00%		0.41%