Write-downs and Other Charges, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Write-downs and other charges [Abstract]
Loss on disposal of assets, net	$ 1,004	$ 3,824	$ (411)	$ 19,608
Transaction-related costs	3,716	0	4,363	0
Severance expense	317	741	847	1,619
Other	10	0	795	(640)
Write-downs and other charges, net	5,047	$ 4,565	5,594	$ 20,587
Deferred Offering Costs	$ 900		900
Gain on sale of land parcels			$ 6,400