Unusual Risk Or Uncertainty [Line Items]

Loans and leases receivable, gross, carrying amount

$ 314,000

$ 11,681,000

$ 314,000

$ 11,681,000

$ 314,000

Unusual Risk Or Uncertainty [Line Items]

Loan guarantee description

The PPP loans, which are 100 percent guaranteed by the SBA, have up to a five-year term to maturity and carry a low interest rate of 1 percent throughout the loan term.

Loan processing fees

$ 6,244,000

$ 2,731,000

11,291,000

2,371,000

Amortization of loan processing fees description

being amortized to interest and fees on loans and leases on the Consolidated Statements of Income over the life of each respective loan.

Unusual Risk Or Uncertainty [Line Items]

Percentage of processing fee per loan

1.00%

Unusual Risk Or Uncertainty [Line Items]

COVID-19 Pandemic Implications (Narrative) (Details) - USD ($)			3 Months Ended		6 Months Ended		12 Months Ended	18 Months Ended
	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Jun. 30, 2021
Unusual Risk Or Uncertainty [Line Items]
Loans and leases receivable, gross, carrying amount	$ 2,495,192,000	$ 2,384,041,000	$ 2,495,192,000	$ 2,445,765,000	$ 2,495,192,000	$ 2,445,765,000	$ 2,384,041,000	$ 2,495,192,000
CARES Act [Member]
Unusual Risk Or Uncertainty [Line Items]
Loans and leases receivable, gross, carrying amount	$ 314,000	$ 11,681,000	$ 314,000		$ 314,000		$ 11,681,000	$ 314,000
Maximum [Member] \| CARES Act [Member]
Unusual Risk Or Uncertainty [Line Items]
Qualifying deferment status percentage of loan portfolio	1.00%	1.00%	1.00%		1.00%		1.00%	1.00%
PPP Loans [Member] \| Small Business Administration [Member]
Unusual Risk Or Uncertainty [Line Items]
Loan guarantee description					The PPP loans, which are 100 percent guaranteed by the SBA, have up to a five-year term to maturity and carry a low interest rate of 1 percent throughout the loan term.
Nonrefundable loan processing fees received	$ 17,997,000				$ 17,997,000		$ 20,883,000	$ 38,880,000
Loan processing fees			$ 6,244,000	$ 2,731,000	11,291,000	2,371,000
Deferred loan processing fees not yet realized	$ 14,472,000	$ 7,746,000			$ 13,600,000		$ 872,000
Amortization of loan processing fees description					being amortized to interest and fees on loans and leases on the Consolidated Statements of Income over the life of each respective loan.
PPP Loans [Member] \| Small Business Administration [Member] \| Interest and Fees on Loans and Leases [Member]
Unusual Risk Or Uncertainty [Line Items]
Loan processing fees					$ 11,291,000	$ 2,371,000
PPP Loans [Member] \| Small Business Administration [Member] \| Minimum [Member]
Unusual Risk Or Uncertainty [Line Items]
Percentage of processing fee per loan					1.00%
PPP Loans [Member] \| Small Business Administration [Member] \| Maximum [Member]
Unusual Risk Or Uncertainty [Line Items]
Percentage of processing fee per loan					5.00%