Commitments and Contingencies (Details) (USD $)	3 Months Ended	12 Months Ended		9 Months Ended
	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Sep. 27, 2010 Predecessor
Summary of contractual obligations
Rent expense	$ 4,551,000	$ 18,711,000	$ 18,336,000	$ 2,177,000
Operating leases
2013		18,149,000
2014		18,336,000
2015		18,014,000
2016		17,752,000
2017		16,287,000
Thereafter		72,518,000
Total		161,056,000
Other
2013		6,667,000
2014		1,125,000
2015		989,000
2016		527,000
2017		142,000
Thereafter		745,000
Total		10,195,000
Total
2013		24,816,000
2014		19,461,000
2015		19,003,000
2016		18,279,000
2017		16,429,000
Thereafter		73,263,000
Total		171,251,000
Other expenses
Open commitments related to construction contracts		$ 35,000,000