CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Allowance for doubtful accounts receivable (in dollars)	$ 921	$ 539
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred Stock Dividend Rate Percentage	8.00%	8.00%
Preferred stock, liquidation preference per share	$ 25.00	$ 25.00
Preferred stock, shares issued	6,100,000	6,100,000
Preferred stock, shares outstanding	6,100,000	6,100,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	64,487,562	64,502,430
Common stock, shares outstanding	64,487,562	64,502,430