Summary of Significant Accounting Policies (Details 5) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Lot Option Purchase Disclosures
Consolidated inventory not owned	$ 33,176,000	$ 39,490,000
Noncontrolling interest	15,879,000	21,824,000	34,223,000
Primary variable interest | Lot option purchase contracts
Lot Option Purchase Disclosures
Consolidated inventory not owned	33,200,000	39,500,000
Cash deposits	17,300,000	17,700,000
Noncontrolling interest	15,900,000	21,800,000
Not primary variable interest | Lot option purchase contracts
Lot Option Purchase Disclosures
Cash deposits and/or letters of credit	36,600,000	22,200,000
Aggregate purchase price	$ 482,800,000	$ 310,100,000