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NOTE 2 - INVESTMENT SECURITIES - Amortized Cost and Fair Value of Investment Securities (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Securities held to maturity:    
Securities held to maturity, at amortized cost $ 388,713 $ 401,913
Securities held to maturity, gross unrealized gains 17,967 5,661
Securities held to maturity, gross unrealized (losses) (468) (6,804)
Securities held to maturity, fair value 406,212 400,770
Securities available for sale:    
Securities available for sale, amortized Cost 251,892 266,671
Securities available for sale, gross unrealized gains 3,900 501
Securities available for sale, gross unrealized (losses) (702) (6,116)
Securities available for sale, fair value 255,090 261,056
US States and Political Subdivisions Debt Securities    
Securities held to maturity:    
Securities held to maturity, at amortized cost 387,663 400,863
Securities held to maturity, gross unrealized gains 17,967 5,661
Securities held to maturity, gross unrealized (losses) (468) (6,803)
Securities held to maturity, fair value 405,162 399,721
Securities available for sale:    
Securities available for sale, amortized Cost 51,948 59,069
Securities available for sale, gross unrealized gains 1,259 180
Securities available for sale, gross unrealized (losses) (18) (703)
Securities available for sale, fair value 53,189 58,546
US Government Agencies Debt Securities    
Securities available for sale:    
Securities available for sale, amortized Cost 35,430 37,150
Securities available for sale, gross unrealized gains 431 39
Securities available for sale, gross unrealized (losses) (99) (778)
Securities available for sale, fair value 35,762 36,411
Residential Mortgage Backed Securities    
Securities available for sale:    
Securities available for sale, amortized Cost 157,760 163,698
Securities available for sale, gross unrealized gains 2,053 182
Securities available for sale, gross unrealized (losses) (585) (4,631)
Securities available for sale, fair value 159,228 159,249
Other Securities    
Securities held to maturity:    
Securities held to maturity, at amortized cost 1,050 1,050
Securities held to maturity, gross unrealized (losses)   (1)
Securities held to maturity, fair value 1,050 1,049
Securities available for sale:    
Securities available for sale, amortized Cost 6,754 6,754
Securities available for sale, gross unrealized gains 157 100
Securities available for sale, gross unrealized (losses)   (4)
Securities available for sale, fair value $ 6,911 $ 6,850