CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Investment securities held to maturity - fair value	$ 647,046	$ 632,380
Loans - allowance for loan losses	$ 63,456	$ 62,453
Preferred Stock, par value (in dollars per share)	$ 1,000	$ 1,000
Preferred Stock, liquidation value per share (in dollars per share)	$ 1,000	$ 1,000
Preferred Stock, authorized (in shares)	600	600
Preferred Stock, issued (in shares)	125	125
Preferred Stock, outstanding (in shares)	125	125
Common Stock, stated value (in dollars per share)	$ 0.125	$ 0.125
Common Stock, authorized (in shares)	50,000,000	50,000,000
Common Stock, issued (in shares)	40,799,025	40,664,259
Common Stock, outstanding (in shares)	40,799,025	40,664,259