Quarterly report pursuant to Section 13 or 15(d)

INVESTMENT SECURITIES (Unrealized Losses on Investment Securities) (Details)

v3.7.0.1
INVESTMENT SECURITIES (Unrealized Losses on Investment Securities) (Details) - USD ($)
Jun. 30, 2017
Dec. 31, 2016
Available-for-sale securities    
Less Than 12 Months, Fair Value $ 306,118,000 $ 246,748,000
Less Than 12 Months, Unrealized Losses 1,078,000 1,541,000
12 Months Or Longer, Fair Value 10,674,000 6,993,000
12 Months Or Longer, Unrealized Losses 86,000 35,000
Total Fair Value 316,792,000 253,741,000
Total Unrealized Losses 1,164,000 1,576,000
Held-to-maturity debt securities    
Less Than 12 Months, Fair Value 113,996,000 79,411,000
Less Than 12 Months, Unrealized Losses 609,000 718,000
12 Months Or Longer, Fair Value 4,067,000 4,010,000
12 Months Or Longer, Unrealized Losses 52,000 38,000
Total Fair Value 118,063,000 83,421,000
Total Unrealized Losses 661,000 756,000
U.S. Government Treasury [Member]    
Available-for-sale securities    
Less Than 12 Months, Fair Value 221,874,000 116,704,000
Less Than 12 Months, Unrealized Losses 808,000 851,000
12 Months Or Longer, Fair Value 0 0
12 Months Or Longer, Unrealized Losses 0 0
Total Fair Value 221,874,000 116,704,000
Total Unrealized Losses 808,000 851,000
U.S. Government Agency [Member]    
Available-for-sale securities    
Less Than 12 Months, Fair Value 46,260,000 48,520,000
Less Than 12 Months, Unrealized Losses 201,000 310,000
12 Months Or Longer, Fair Value 9,608,000 6,699,000
12 Months Or Longer, Unrealized Losses 79,000 34,000
Total Fair Value 55,868,000 55,219,000
Total Unrealized Losses 280,000 344,000
States and Political Subdivisions [Member]    
Available-for-sale securities    
Less Than 12 Months, Fair Value 37,984,000 81,521,000
Less Than 12 Months, Unrealized Losses 69,000 380,000
12 Months Or Longer, Fair Value 1,063,000 294,000
12 Months Or Longer, Unrealized Losses 7,000 1,000
Total Fair Value 39,047,000 81,815,000
Total Unrealized Losses 76,000 381,000
Mortgage-Backed Securities [Member]    
Available-for-sale securities    
Less Than 12 Months, Fair Value 0 3,000
Less Than 12 Months, Unrealized Losses 0 0
12 Months Or Longer, Fair Value 3,000 0
12 Months Or Longer, Unrealized Losses 0 0
Total Fair Value 3,000 3,000
Total Unrealized Losses 0 0
U.S. Government Treasury [Member]    
Held-to-maturity debt securities    
Less Than 12 Months, Fair Value 78,091,000 35,210,000
Less Than 12 Months, Unrealized Losses 166,000 81,000
12 Months Or Longer, Fair Value 0 0
12 Months Or Longer, Unrealized Losses 0 0
Total Fair Value 78,091,000 35,210,000
Total Unrealized Losses 166,000 81,000
U.S. Government Agency [Member]    
Held-to-maturity debt securities    
Less Than 12 Months, Fair Value 0 0
Less Than 12 Months, Unrealized Losses 0 0
12 Months Or Longer, Fair Value 0 0
12 Months Or Longer, Unrealized Losses 0 0
Total Fair Value 0 0
Total Unrealized Losses 0 0
States and Political Subdivisions [Member]    
Held-to-maturity debt securities    
Less Than 12 Months, Fair Value 1,065,000 7,491,000
Less Than 12 Months, Unrealized Losses 2,000 38,000
12 Months Or Longer, Fair Value 0 0
12 Months Or Longer, Unrealized Losses 0 0
Total Fair Value 1,065,000 7,491,000
Total Unrealized Losses 2,000 38,000
Mortgage-Backed Securities [Member]    
Held-to-maturity debt securities    
Less Than 12 Months, Fair Value 34,840,000 36,710,000
Less Than 12 Months, Unrealized Losses 441,000 599,000
12 Months Or Longer, Fair Value 4,067,000 4,010,000
12 Months Or Longer, Unrealized Losses 52,000 38,000
Total Fair Value 38,907,000 40,720,000
Total Unrealized Losses $ 493,000 $ 637,000