Balance Sheet Parenthetical (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Held-to-Maturity Securities, at Fair Value	$ 347,441	$ 325,930	$ 324,009
Preferred Stock, Par Value, in Dollars Per Share	$ 5	$ 5	$ 5
Preferred Stock, Shares Authorized, in Shares	1,000,000	1,000,000	1,000,000
Common Stock, Par Value, in Dollars Per Share	$ 1	$ 1	$ 1
Common Stock, Shares Authorized, in Shares	20,000,000	20,000,000	20,000,000
Common Stock, Shares Issued, in Shares	17,943,201	17,420,776	17,420,776
Unallocated ESOP Shares, in Shares	38,396	55,275	55,185
Treasury Stock, in Shares	4,479,257	4,426,072	4,460,654