CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Stockholders' equity
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, liquidation preference	$ 12,000	$ 22,252
Preferred stock, dividend rate (in hundredths)	5.00%	5.00%
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	12,000	22,252
Preferred stock, shares outstanding (in shares)	12,000	22,252
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	7,962,693	7,937,143
Common stock, shares outstanding (in shares)	7,962,693	7,937,143