Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
INCOME TAXES [Abstract]
Statutory federal income tax rate (in hundredths)					34.00%
Statutory federal income tax rate reconciliation [Abstract]
Computed tax benefit at statutory rate					$ 3,116	$ 2,169
Non-controlling interest					(263)	(205)
Alternative minimum tax expense					133	21
Stock options expense					43	20
Nondeductible expense					92	146
Bank owned life insurance					(489)	(169)
Federal net operating loss-KNBT*						1,368
State taxes					(49)	8
Adjustment to prior year items					(82)	67
Increase (decrease) in valuation allowance					(4,297)	(8,564)
Income tax (benefit) expense	$ (1,881)	$ 25	$ 60	$ (5,139)	$ (1,796)	$ (5,139)