Noncontrolling Interest (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended								12 Months Ended
	Dec. 31, 2010	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Noncontrolling Interest
Balance at the beginning of the period					$ 11				$ 182	$ 11	$ 182
Net loss-noncontrolling interest	(18)	(25)	(24)	(31)	(30)	(46)	(57)	(36)	(32)	(110)	(171)
Balance at the end of the period	$ 182	$ (99)				$ 11				$ (99)	$ 11
Rest Assured LLC
Noncontrolling Interest
Ownership interest (as a percent)	66.70%