LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES - Summary of average recorded investment balance of impaired loans and interest income recognized on impaired loans by portfolio segment (Details 8) (Loans receivable, USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Originated
Impaired loans without a valuation allowance:
Impaired loans without a valuation allowance, Average Recorded Investment	$ 4,108
Impaired loans without a valuation allowance, Interest Income Recognized	92
Impaired loans with a valuation allowance:
Impaired loans with a valuation allowance, Average Recorded Investment	1,124	3,967
Impaired loans with a valuation allowance, Interest Income Recognized	51	101
Total impaired loans
Total impaired loans, Average Recorded Investment	5,232	3,967
Total impaired loans, Interest Income Recognized	143	101
Originated | Residential Real Estate
Impaired loans without a valuation allowance:
Impaired loans without a valuation allowance, Average Recorded Investment	864
Impaired loans without a valuation allowance, Interest Income Recognized	21
Impaired loans with a valuation allowance:
Impaired loans with a valuation allowance, Average Recorded Investment		1,900
Impaired loans with a valuation allowance, Interest Income Recognized		29
Originated | Commercial Real Estate
Impaired loans without a valuation allowance:
Impaired loans without a valuation allowance, Average Recorded Investment	1,714
Impaired loans without a valuation allowance, Interest Income Recognized	21
Impaired loans with a valuation allowance:
Impaired loans with a valuation allowance, Average Recorded Investment	459	1,131
Impaired loans with a valuation allowance, Interest Income Recognized	24	38
Originated | Home equity
Impaired loans without a valuation allowance:
Impaired loans without a valuation allowance, Average Recorded Investment	96
Impaired loans without a valuation allowance, Interest Income Recognized	2
Impaired loans with a valuation allowance:
Impaired loans with a valuation allowance, Average Recorded Investment	665	246
Impaired loans with a valuation allowance, Interest Income Recognized		6
Originated | Commercial business
Impaired loans without a valuation allowance:
Impaired loans without a valuation allowance, Average Recorded Investment	1,434
Impaired loans without a valuation allowance, Interest Income Recognized	48
Impaired loans with a valuation allowance:
Impaired loans with a valuation allowance, Average Recorded Investment		690
Impaired loans with a valuation allowance, Interest Income Recognized	27	28
Acquired
Impaired loans without a valuation allowance:
Impaired loans without a valuation allowance, Average Recorded Investment	599
Impaired loans without a valuation allowance, Interest Income Recognized	20
Total impaired loans
Total impaired loans, Average Recorded Investment	599
Total impaired loans, Interest Income Recognized	20
Acquired | Commercial business
Impaired loans without a valuation allowance:
Impaired loans without a valuation allowance, Average Recorded Investment	599
Impaired loans without a valuation allowance, Interest Income Recognized	$ 20