CONDENSED CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Allowance for doubtful accounts receivable	$ 1,187	$ 246
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000	10,000
Preferred stock, dividend rate, percentage	8.00%
Preferred stock, liquidation preference per share	$ 25
Preferred stock, shares issued	2,300	0
Preferred stock, shares outstanding	2,300	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	90,000	90,000
Common stock, shares issued	31,085	30,710
Common stock, shares outstanding	31,085	30,710