Acquisitions - Redeemable Noncontrolling Interest (Details) (USD $) In Thousands, unless otherwise specified	10 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Feb. 23, 2012 Fair Value, Inputs, Level 3 [Member]
Redeemable Noncontrolling Interest [Line Items]
Redeemable noncontrolling interest, beginning balance					$ 25,630
Distributions to noncontrolling interests	(1,260)
Net income attributable to noncontrolling interest	2,410	2,410	0	0
Redeemable noncontrolling interest, ending balance	$ 26,780	$ 26,780	$ 0