SECURITIES AVAILABLE FOR SALE - UNREALIZED LOSSES (Details)	Dec. 31, 2016 USD ($) item	Dec. 31, 2015 USD ($)
Securities with unrealized losses
Less than 12 Months, Fair Value	$ 175,838,000	$ 104,079
Less than 12 Months, Unrealized Loss	(2,953,000)	(1,389)
12 Months or More, Fair Value	13,652,000	57,846
12 Months or More, Unrealized Loss	(739,000)	(995)
Total, Fair Value	189,490,000	161,925
Total, Unrealized Loss	(3,692,000)	(2,384)
Trading Assets
Trading Assets	5,592,000	5,531,000
U.S. government agencies
Securities with unrealized losses
Less than 12 Months, Fair Value	28,202,000	15,243
Less than 12 Months, Unrealized Loss	(299,000)	(56)
12 Months or More, Fair Value		30,293
12 Months or More, Unrealized Loss		(144)
Total, Fair Value	28,202,000	45,536
Total, Unrealized Loss	$ (299,000)	(200)
Amortized cost (as a percent)	1.10%
States and municipals
Securities with unrealized losses
Less than 12 Months, Fair Value	$ 27,834,000	10,938
Less than 12 Months, Unrealized Loss	(716,000)	(102)
12 Months or More, Fair Value		4,065
12 Months or More, Unrealized Loss		(81)
Total, Fair Value	27,834,000	15,003
Total, Unrealized Loss	$ (716,000)	(183)
Number of securities having unrealized losses | item	52
Amortized cost (as a percent)	1.80%
Mortgage-backed - residential
Securities with unrealized losses
Less than 12 Months, Fair Value	$ 119,802,000	77,898
Less than 12 Months, Unrealized Loss	(1,938,000)	(1,231)
12 Months or More, Fair Value	13,652,000	23,488
12 Months or More, Unrealized Loss	(739,000)	(770)
Total, Fair Value	133,454,000	101,386
Total, Unrealized Loss	$ (2,677,000)	$ (2,001)
Number of securities having unrealized losses | item	70
Amortized cost (as a percent)	1.60%