Balance Sheet Parenthetical (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Held-To-Maturity Securities, at Fair Value	$ 343,751	$ 325,930
Preferred Stock, Par Value	$ 5	$ 5
Preferred Stock, Shares Authorized	1,000,000	1,000,000
Common Stock, Par Value	$ 1	$ 1
Common Stock, Shares Authorized	20,000,000	20,000,000
Common Stock, Shares Issued	17,943,201	17,420,776
Unallocated ESOP Shares - Shares	19,466	55,275
Treasury Stock, Shares	4,441,093	4,423,072