Commitments and Contingencies Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Commitments and Contingencies [Abstract]
Letters of Credit and Completion Bonds	$ 65,854
Performance bonds outstanding	37,614
Performance letters of credit outstanding	13,867
Financial Letters of Credit	10,947
Financial Letters of Credit representing deposits on land and lot purchase agreements	4,713
Financial Bonds	3,427
Unrecorded Conditional Purchase Obligation	$ 301,707