Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Name:	us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Summary of Significant Accounting Policies - Recent Accounting Pronouncements - Allowance for Loan and Lease Losses (Details) - USD ($) $ in Thousands	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018
Loans and Leases Receivable, Net Amount [Abstract]
Allowance for loan and lease losses		$ 9,923	$ 9,750
Accounting Standards Update 2016-13 [Member] \| Restatement Adjustment [Member] \| Forecast [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Allowance for loan and lease losses	$ 12,000