MORTGAGE SERVICING RIGHTS - Balance of loans serviced for others and fair value of mortgage servicing rights (Details) (Balance of loans serviced for others and fair value of mortgage servicing rights, USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Balance of loans serviced for others and fair value of mortgage servicing rights
Residential mortgage loans serviced for others	$ 140,893	$ 146,726
Fair value of mortgage servicing rights	$ 1,624	$ 1,550