Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Held-To-Maturity Securities, at Fair Value		$ 280,338
Preferred Stock, Par Value (in dollars per share)	$ 1	$ 5
Preferred Stock, Shares Authorized (in shares)	1,000,000	1,000,000
Common Stock, Par Value (in dollars per share)	$ 1	$ 1
Common Stock, Shares Authorized (in shares)	30,000,000	20,000,000
Common Stock, Shares Issued (in shares)	19,606,449	19,035,565
Unallocated ESOP Shares (in shares)	0	5,001
Treasury Stock, Shares (in shares)	4,608,258	4,558,207