Acquisition of Shore Community Bank (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
	Nov. 08, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill						$ 35,000
Estimated future credit losses		$ 3	$ 18	$ 168	$ 481
Merger-related expenses		$ 0	$ 302	$ 64	$ 575
Shore Community Bank
Business Acquisition [Line Items]
Percentage of interests acquired	100.00%
Total consideration paid	$ 54,333
Number of shares issued (in shares)	1,509,275
Company stock issued	$ 29,175
Cash payment to acquire business	25,100
Cash payment for unexercised outstanding stock options	925
Goodwill	$ 23,194
Measurement adjustment term	1 year
Acquired loans receivable	$ 205,833
Core deposit intangible asset	1,467
Merger-related expenses						$ 1,700
Financial Asset Acquired with Credit Deterioration | Shore Community Bank
Business Acquisition [Line Items]
Estimated future credit losses	3,600
Acquired loans receivable	4,571
Financial Asset Acquired and No Credit Deterioration | Shore Community Bank
Business Acquisition [Line Items]
Acquired loans receivable	201,262
Core Deposits | Shore Community Bank
Business Acquisition [Line Items]
Core deposit intangible asset	$ 1,500
Acquired intangible assets, weighted average useful life	10 years