CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accounts receivable, allowance	$ 246	$ 135
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	30,000	30,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock - Class A, par value	$ 0.01	$ 0.01
Common stock - Class A, shares authorized	400,000	400,000
Common stock - Class A, shares issued	126,933	126,933
Common stock - Class A, shares outstanding	109,675	109,675