Consolidated Balance Sheet Statement Parenthetical (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Investment securities available for sale at amortized cost	$ 694,832	$ 690,556
Investment securities held to maturity at fair value	$ 110,917	$ 0
Preferred Stock, Par Value Per Share	$ 1.00	$ 1.00
Preferred Stock, Shares Authorized	2,000,000	2,000,000
Common Stock, Par Value Per Share	$ 1.00	$ 1.00
Common Stock, Shares Authorized	170,000,000	170,000,000
Common Stock, Shares, Issued	79,837,612	78,743,518
Common Stock, Shares, Outstanding	79,837,612	78,743,518