Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Accounting Standards Update and Change in Accounting Principle

The following table illustrates the impact of ASC 326 on loans, leases, purchased financial assets, debt securities, other assets and unfunded lending commitments compared to the incurred loss approach, as disclosed prior to adoption on January 1, 2020.

	January 1, 2020
	As reported under ASC 326		Pre-ASC 326 Adoption		Impact of ASC 326 Adoption
(Dollars in thousands)
Assets:
Investment securities, held-to-maturity
State and political subdivisions	$	(8)	$	—	$	(8)
Allowance for credit losses on held-to-maturity debt securities	$	(8)	$	—	$	(8)
Loans and leases
Commercial and industrial(1)	(42,596)		(22,849)		(19,747)
Owner-occupied commercial	(3,144)		(4,616)		1,472
Commercial mortgages	(9,114)		(7,452)		(1,662)
Construction	(4,572)		(3,891)		(681)
Residential	(8,903)		(1,381)		(7,522)
Consumer	(15,102)		(7,387)		(7,715)
Allowance for credit losses on loans and leases	$	(83,431)	$	(47,576)	$	(35,855)
Other assets
Deferred tax assets	18,452		9,991		8,461
Liabilities:
Other liabilities
Allowance for credit losses on unfunded lending commitments	(4,513)		(1,547)		(2,966)
Total ASC 326 impact to retained earnings					$	30,368

(1)Includes commercial small business leases.