Balance Sheet Parenthetical (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Mar. 31, 2014
Held-to-Maturity Securities, at Fair Value	$ 328,361	$ 308,566	$ 304,259
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	17,079,376	17,079,376	16,744,486
Unallocated ESOP Shares, in Shares	58,606	71,748	74,845
Treasury Stock, in Shares	4,397,740	4,386,001	4,319,587