Acquisition of Riverview Financial Corporation (Pro Forma Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Net interest income after loan loss provision	$ 29,002	$ 26,569	$ 25,727	$ 24,325	$ 26,289	$ 20,308	$ 20,296	$ 17,115	$ 105,623	$ 84,008	$ 68,758
Noninterest income	5,660	5,509	5,652	4,712	6,050	5,302	3,622	2,934	21,533	17,908	12,621
Noninterest expense	$ 34,072	$ 20,019	$ 19,456	$ 17,558	$ 21,419	$ 18,174	$ 15,403	$ 15,581	91,105	70,577	$ 59,953
Riverview [Member]
Business Acquisition [Line Items]
Net interest income after loan loss provision									147,987	116,989
Noninterest income									32,638	26,681
Noninterest expense									123,475	108,531
Net income									$ 57,150	$ 35,139
Net income per common share									$ 3.73	$ 2.72