Other Assets (Tables)

12 Months Ended

Dec. 31, 2016

Other Assets

Schedule of carrying amount of goodwill reported in reporting units

	Retail		Commercial
(in thousands)	Banking		Banking		Total
December 31, 2016	$	687,492	$	308,000	$	995,492
December 31, 2015		687,492		308,000		995,492

Schedule of estimated future amortization expense for mortgage servicing assets

	Estimated
(dollars in thousands)	Amortization
Year ending December 31:
2017	$	2,435
2018		2,124
2019		1,863
2020		1,637
2021		1,436

Schedule of gross carrying values, accumulated amortization, and net carrying values of mortgage servicing assets

	December 31,
(dollars in thousands)	2016		2015
Gross carrying amount	$	56,544	$	56,479
Accumulated amortization		39,735		35,044
Net carrying value	$	16,809	$	21,435

Schedule of changes in amortized mortgage servicing assets

	Year Ended December 31,
(dollars in thousands)	2016		2015
Balance at beginning of year	$	21,435	$	25,191
Originations		65		1,786
Amortization		(4,691)		(5,542)
Balance at end of year	$	16,809	$	21,435
Fair value of amortized MSRs at end of year	$	25,160	$	29,676
Balance of loans serviced for others	$	2,702,489	$	3,220,865

Schedule of quantitative assumptions used in determining lower of cost or fair value of MSRs

	2016							2015
						Weighted							Weighted
	Range					Average		Range					Average
Conditional prepayment rate	8.61	%	-	18.01	%	9.16	%	8.54	%	-	16.50	%	9.20	%
Life in years (of the MSR)	3.75		-	7.26		6.19		3.89		-	7.42		6.36
Weighted-average coupon rate	3.99	%	-	6.87	%	4.06	%	4.02	%	-	7.02	%	4.08	%
Discount rate	10.46	%	-	10.52	%	10.50	%	10.50	%	-	10.52	%	10.50	%