CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Allowance for doubtful accounts receivable (in dollars)	$ 121	$ 246
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, dividend rate, percentage	8.00%	8.00%
Preferred stock, liquidation preference per share	$ 25.00	$ 25.00
Preferred stock, shares issued	2,300,000	0
Preferred stock, shares outstanding	2,300,000	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	90,000,000	90,000,000
Common stock, shares issued	38,558,048	30,709,877
Common stock, shares outstanding	38,558,048	30,709,877