Unconsolidated Joint Ventures - Income Statement (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Jun. 29, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]
Revenues		$ 115,370	$ 35,720	$ 254,780	$ 88,166
Cost of sales		87,645	29,326	196,928	69,490
Gross margin		27,725	6,394	57,852	18,676
Operating expenses		6,819	3,970	18,542	11,114
Net income of unconsolidated joint ventures		20,906	2,424	39,310	7,562
Equity in net income of unconsolidated joint ventures reflected in the accompanying consolidated statements of operations	$ 1,600	$ 4,056	$ 50	$ 9,180	$ 995