Commitments and Contingencies Commitments and Contingencies (Details) $ in Thousands	Dec. 31, 2015 USD ($)
Commitments and Contingencies [Abstract]
Letters of Credit and Completion Bonds	$ 144,058
Outstanding Performance and Maintenance Bonds	94,250
Performance letters of credit outstanding	30,129
Financial Letters of Credit	12,374
Financial Letters of Credit representing deposits on land and lot purchase agreements	6,503
Financial Bonds	7,305
Unrecorded Conditional Purchase Obligation	$ 513,234