Loans - Additional Information (Details)	3 Months Ended
	Mar. 31, 2016 USD ($) category class contract component	Mar. 31, 2015 USD ($) loan contract	Dec. 31, 2015 USD ($)	Jun. 01, 2013 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired financing receivable, unpaid principal balance	$ 17,364,000		$ 16,063,000
Financing receivable individually evaluated for impairment minimum amount	100,000
Individually evaluated for impairment	$ 100,000
Payment delays limit (in days)	90 days
Impaired financing receivable commitment to lend	$ 23,000
Reasonable period to classify from troubled debt restructuring non performing loans to performing loans (in months)	6 months
Number of Contracts | contract		8
Number of contracts | contract	5
Number of loans granted term concessions | loan		2
Loans granted term concessions, amount		$ 97,000
Number of loans granted concessions due to other default | loan		6
Loans granted concessions due to other default, amount		$ 504,000
Recorded investment	$ 9,503,000		9,645,000
Number of categories considered not criticized and rated as, Pass | category	6
Minimum period after which loans are considered as substandard (in days)	90 days
The total number of components that represents the allowance for loan losses | component	2
The number of classes that groups of loans are collectively evaluated for impairment | class	2
Period considered for quarter moving average which used in calculating historical charge off (in months)	36 months
Luzerne National Bank Corporation
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value				$ 878,000
Receivables Acquired with Deteriorated Credit Quality
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, net	$ 337,000		341,000
Financing receivable, allowance for credit losses	$ 0
Real estate mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of categories in which real estate loans segmented | category	3
Purchased loans | Luzerne National Bank Corporation
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired financing receivable, unpaid principal balance				1,211,000
Contractually required payments				1,783,000
Cash flows expected to be collected				941,000
Certain loans acquired in transfer not accounted for as debt securities non accretable yield				842,000
Accretable yield				$ 63,000
Purchased loans | Receivables Acquired with Deteriorated Credit Quality
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, net	$ 337,000
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired financing receivable, unpaid principal balance	$ 13,246,000		12,537,000
Number of Contracts | contract		1
Number of contracts | contract	1	1
Recorded investment	$ 239,000	$ 48,000
Commercial | Receivables Acquired with Deteriorated Credit Quality
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, net	$ 0		0
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of contracts | contract	3
Recorded investment	$ 173,000
Commercial Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of contracts | contract	1
Recorded investment	$ 103,000
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired financing receivable, unpaid principal balance	3,244,000		2,845,000
Number of Contracts | contract		5
Real estate acquired through foreclosure	126,000		102,000
Mortgage loans in process of foreclosure, amount	938,000		448,000
Residential | Receivables Acquired with Deteriorated Credit Quality
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, net	$ 337,000		$ 341,000