Short-term borrowings (Tables)

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Schedule of Short-term Debt

The detail of short-term borrowings for the years 2018, 2017 and 2016 is presented in the following table:

(Dollars in thousands)	Federal Funds Purchased			Securities Sold Under Agreements to Repurchase			Trading Liabilities			Other Short-term Borrowings
2018
Average balance	$	405,110		$	713,841		$	682,943		$	1,046,585
Year-end balance	256,567			762,592			335,380			114,764
Maximum month-end outstanding	503,138			891,425			890,717			2,229,155
Average rate for the year	1.89		%	1.40		%	2.83		%	1.82		%
Average rate at year-end	2.50			1.66			3.21			2.48
2017
Average balance	$	447,137		$	578,666		$	685,891		$	554,502
Year-end balance	399,820			656,602			638,515			2,626,213
Maximum month-end outstanding	568,490			743,684			896,943			2,626,213
Average rate for the year	1.06		%	0.72		%	2.26		%	1.28		%
Average rate at year-end	1.48			0.64			2.22			1.44
2016
Average balance	$	589,223		$	425,452		$	771,039		$	198,440
Year-end balance	414,207			453,053			561,848			83,177
Maximum month-end outstanding	695,083			528,024			874,076			792,736
Average rate for the year	0.52		%	0.08		%	1.95		%	0.67		%
Average rate at year-end	0.73			0.08			2.46			0.96