Condensed Consolidated Balance Sheets Balance Sheet Parentheticals (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Securities available-for-sale at amortized cost	$ 374,680	$ 336,349
Accumulated amortization on core deposit intangible	$ 10,047	$ 9,869
Preferred stock, par value	$ 0	$ 0
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	28,405	28,405
Preferred stock, shares outstanding	28,405	28,405
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	43,151,651	43,151,651
Common stock, shares outstanding	43,151,651	43,151,651