Consolidated Statements of Changes in Equity (USD $) In Thousands, unless otherwise specified	Total	Preferred Stock	Common Stock	Capital Surplus	Retained Earnings	Accumulated Other Comprehensive Income	Treasury Stock	Noncontrolling Interest
Balance at beginning of period at Dec. 31, 2010	$ 331,784	$ 78,483	$ 16,612	$ 44,628	$ 184,525	$ 8,517	$ (3,674)	$ 2,693
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	31,638				28,044	3,630		(36)
Sale of noncontrolling interest	18							18
Cumulative preferred dividends accrued and discount accretion	0	3,215			(3,215)
Repurchase of Series B preferred stock and warrants	(83,498)	(81,698)		(1,800)
Issuance of Series C preferred stock	81,698	81,698
Cash dividends declared:
Preferred	(4,606)				(4,606)
Common	(6,566)				(6,566)
Purchase of shares of common stock	(389)						(389)
Issuance of shares of common stock	1,536			(773)			2,309
Commitments to issue common stock	1,278			1,278
Balance at end of period at Dec. 31, 2011	352,893	81,698	16,612	43,333	198,182	12,147	(1,754)	2,675
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	54,345				49,792	4,494		59
Cash dividends declared:
Preferred	(3,400)				(3,400)
Common	(8,295)				(8,295)
Purchase of shares of common stock	(2,937)						(2,937)
Issuance of shares of common stock	9,779		216	4,872			4,691
Commitments to issue common stock	2,154			2,154
Balance at end of period at Dec. 31, 2012	404,539	81,698	16,828	50,359	236,279	16,641	0	2,734
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	2,876				36,789	(33,977)		64
Cash dividends declared:
Preferred	(1,093)				(1,093)
Common	(6,908)				(6,908)
Purchase of noncontrolling interest	(2,798)							(2,798)
Purchase of shares of common stock	(2,102)						(2,102)
Issuance of shares of common stock	43,118		1,571	39,445			2,102
Commitments to issue common stock	1,828			1,828
Balance at end of period at Dec. 31, 2013	$ 439,460	$ 81,698	$ 18,399	$ 91,632	$ 265,067	$ (17,336)	$ 0	$ 0