Consolidated Balance Sheets (Parenthetical) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Mortgage Loans:
Mortgages Held-for-sale, Fair Value Disclosure	$ 4,447,000	$ 4,981,000
Investment Securities:
Available-for-sale Securities Pledged as Collateral	$ 578,090,000	$ 568,257,000
Stockholders' Equity:
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	6,000	6,000
Common stock, par value	$ 5.00	$ 5.00
Common Stock, Shares Authorized	120,000,000	120,000,000
Common stock, shares issued	97,972,433	97,972,433
Treasury stock, shares	1,212,837	603,003