Allowance for Loan Losses Allowance for Losses on Lending-Related Commitments and Impaired Loans (Summary of Impaired Loans Evaluated for Impairment by Loan Class) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[1]	$ 49,961	$ 69,487
Related Allowance		6,380	6,270
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		51,294	57,925
Impaired Financing Receivable, Recorded Investment	[2]	101,255	127,412
Impaired Financing Receivable, Unpaid Principal Balance		124,249	153,742
Impaired Financing Receivable, Average Recorded Investment		107,170	134,967	$ 170,700
Impaired Financing Receivable, Interest Income, Accrual Method		6,198	7,190	$ 8,900
Home equity
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		423	1,946
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		435	2,055
Related Allowance		333	475
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		351	1,995
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		16	80
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		6,424	4,453
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		7,987	6,172
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		5,738	4,666
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		288	256
Residential real estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		4,710	5,467
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		4,799	5,600
Related Allowance		294	606
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		4,618	5,399
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		182	241
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		11,559	12,640
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		13,979	14,334
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		11,903	12,682
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		624	595
Consumer and other
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		195	211
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		220	213
Related Allowance		10	26
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		216	214
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		12	10
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		197	161
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		267	222
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		201	173
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		12	11
Commercial and industrial | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		9,754	9,989
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		12,498	10,785
Related Allowance		2,012	1,915
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		10,123	10,784
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		792	539
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		8,274	5,797
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		9,537	8,862
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		9,510	6,664
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		494	595
Franchise | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0	0
Related Allowance		0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		0	0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0	0
Mortgage warehouse lines of credit | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0	0
Related Allowance		0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		0	0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0	0
Community Advanatage - homeowners association | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0	0
Related Allowance		0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		0	0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0	0
Aircraft | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0	0
Related Allowance		0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		288	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		378	0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		375	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		27	0
Asset-based lending | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0	0
Related Allowance		0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		8	25
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		1,570	1,952
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		5	87
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		88	100
Tax exempt | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0	0
Related Allowance		0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		0	0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0	0
Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0	0
Related Allowance		0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		0	0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0	0
Other | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0	0
Related Allowance		0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		0	0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0	0
Residential construction | Commercial real estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0	0
Related Allowance		0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		2,296	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		2,296	0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		2,300	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		112	0
Commercial construction | Commercial real estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0	0
Related Allowance		0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		32	2,875
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		33	3,085
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		16	3,183
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		1	151
Land | Commercial real estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		4,929	5,011
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		8,711	8,626
Related Allowance		41	43
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		5,127	5,933
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		547	544
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		888	10,210
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		2,373	10,941
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		929	10,268
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		90	430
Office | Commercial real estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		5,050	11,038
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		6,051	12,863
Related Allowance		632	305
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		5,394	11,567
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		314	576
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		3,500	4,132
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		4,484	5,020
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		3,613	4,445
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		237	216
Industrial | Commercial real estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		8,413	195
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		9,105	277
Related Allowance		1,943	15
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		10,590	214
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		565	13
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		2,217	4,160
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		2,426	4,498
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		2,286	3,807
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		188	286
Retail | Commercial real estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		8,527	11,045
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		9,230	14,566
Related Allowance		343	487
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		8,596	12,116
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		386	606
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		2,757	5,487
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		2,925	7,470
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		2,897	6,915
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		129	330
Multi-family | Commercial real estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		370	2,808
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		370	3,321
Related Allowance		202	158
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		372	2,839
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		25	145
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		2,344	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		2,807	0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		2,390	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		117	0
Mixed use and other | Commercial real estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		7,590	21,777
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		7,708	24,076
Related Allowance		570	2,240
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		7,681	21,483
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		328	1,017
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		10,510	7,985
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		14,060	8,804
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		11,939	9,533
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		624	449
Commercial insurance loans | Premium finance receivables
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0	0
Related Allowance		0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		0	0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0	0
Life insurance loans | Premium finance receivables
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0	0
Related Allowance		0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		0	0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0	0
PCI - life insurance loans | Premium finance receivables
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0	0
Related Allowance		0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		0	0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		$ 0	$ 0

[1] These impaired loans require an allowance for loan losses because the estimated fair value of the loans or related collateral is less than the recorded investment in the loans.

[2] Impaired loans are considered by the Company to be non-accrual loans, TDRs or loans with principal and/or interest at risk, even if the loan is current with all payments of principal and interest.