Fair Value Measurement and Fair Value of Financial Instruments (Carrying Amounts of Assets That Were Still Held and Had Fair Value Changes Measured on a Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Loans
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	$ 33,901
Loans | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	29,612
Loans | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	4,289
Loans | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	0
Loans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	0
Loans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	0
Loans | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	0
Loans | Significant Other Observable Inputs (Level 2) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	0
Loans | Significant Other Observable Inputs (Level 2) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	0
Loans | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	33,901
Loans | Significant Unobservable Inputs (Level 3) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	29,612
Loans | Significant Unobservable Inputs (Level 3) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	4,289
Loans | Commercial and industrial (“C&I”) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	28,877
Loans | Commercial and industrial (“C&I”) | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	0
Loans | Commercial and industrial (“C&I”) | Significant Other Observable Inputs (Level 2) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	0
Loans | Commercial and industrial (“C&I”) | Significant Unobservable Inputs (Level 3) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	28,877
Loans | Commercial real estate (“CRE”) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	735
Loans | Commercial real estate (“CRE”) | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	0
Loans | Commercial real estate (“CRE”) | Significant Other Observable Inputs (Level 2) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	0
Loans | Commercial real estate (“CRE”) | Significant Unobservable Inputs (Level 3) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	735
Loans | HELOCs | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	1,798
Loans | HELOCs | Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	0
Loans | HELOCs | Significant Other Observable Inputs (Level 2) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	0
Loans | HELOCs | Significant Unobservable Inputs (Level 3) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	1,798
Loans | Other consumer | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	2,491
Loans | Other consumer | Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	0
Loans | Other consumer | Significant Other Observable Inputs (Level 2) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	0
Loans | Other consumer | Significant Unobservable Inputs (Level 3) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	2,491
Non-PCI impaired loans
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		$ 49,679
Non-PCI impaired loans | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		48,307
Non-PCI impaired loans | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		1,372
Non-PCI impaired loans | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		0
Non-PCI impaired loans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		0
Non-PCI impaired loans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		0
Non-PCI impaired loans | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		0
Non-PCI impaired loans | Significant Other Observable Inputs (Level 2) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		0
Non-PCI impaired loans | Significant Other Observable Inputs (Level 2) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		0
Non-PCI impaired loans | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		49,679
Non-PCI impaired loans | Significant Unobservable Inputs (Level 3) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		48,307
Non-PCI impaired loans | Significant Unobservable Inputs (Level 3) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		1,372
Non-PCI impaired loans | Commercial and industrial (“C&I”) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		47,554
Non-PCI impaired loans | Commercial and industrial (“C&I”) | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		0
Non-PCI impaired loans | Commercial and industrial (“C&I”) | Significant Other Observable Inputs (Level 2) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		0
Non-PCI impaired loans | Commercial and industrial (“C&I”) | Significant Unobservable Inputs (Level 3) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		47,554
Non-PCI impaired loans | Commercial real estate (“CRE”) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		753
Non-PCI impaired loans | Commercial real estate (“CRE”) | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		0
Non-PCI impaired loans | Commercial real estate (“CRE”) | Significant Other Observable Inputs (Level 2) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		0
Non-PCI impaired loans | Commercial real estate (“CRE”) | Significant Unobservable Inputs (Level 3) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		753
Non-PCI impaired loans | HELOCs | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		1,372
Non-PCI impaired loans | HELOCs | Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		0
Non-PCI impaired loans | HELOCs | Significant Other Observable Inputs (Level 2) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		0
Non-PCI impaired loans | HELOCs | Significant Unobservable Inputs (Level 3) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans		1,372
OREO
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure		125
OREO | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure		0
OREO | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure		0
OREO | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure		125
Investments in tax credit and other investments, net
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure	3,076	3,076
Investments in tax credit and other investments, net | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure	0	0
Investments in tax credit and other investments, net | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure	0	0
Investments in tax credit and other investments, net | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure	3,076	$ 3,076
Other nonperforming assets
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure	867
Other nonperforming assets | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure	0
Other nonperforming assets | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure	0
Other nonperforming assets | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure	$ 867