MERGERS AND ACQUISITIONS - Net Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Aug. 28, 2015	Dec. 31, 2014	Dec. 31, 2013
Liabilities assumed:
Goodwill	$ 18,480	$ 18,480		$ 17,779	$ 17,779
Two Susquehanna Bank Branches
Net assets acquired:
Cash received in transaction			$ 47,962
Cash on hand			330
Loans			18,200
Bank premises, furniture and equipment			609
Accrued interest receivable and other assets			62
Core deposit intangible			878
Net assets assumed			68,041
Liabilities assumed:
Deposits			68,697
Accrued interest payable and other liabilities			45
Liabilities assumed			68,742
Net liabilities assumed			(701)
Goodwill			701
Assets acquired, goodwill, and liabilities assumed, net			$ 0