Commitments and Contingencies Commitments and Contingencies (Details) (USD $)	Jun. 30, 2013
Commitments and Contingencies [Abstract]
Letters of Credit and Completion Bonds	$ 75,700,000
Performance bonds outstanding	45,600,000
Performance letters of credit outstanding	14,000,000
Financial Letters of Credit	12,600,000
Financial Letters of Credit representing deposits on land and lot purchase agreements	6,377,000
Financial Bonds	3,500,000
Unrecorded Conditional Purchase Obligation	$ 321,000,000