Variable Interest Entities ("VIE") (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Lot Option Purchase Disclosures
Consolidated inventory not owned	$ 31,325,000	$ 33,176,000
Noncontrolling interest	14,598,000	15,879,000
Primary variable interest | Lot option purchase contracts
Lot Option Purchase Disclosures
Consolidated inventory not owned	31,300,000	33,200,000
Cash deposits	16,700,000	17,300,000
Noncontrolling interest	14,600,000	15,900,000
Not primary variable interest | Lot option purchase contracts
Lot Option Purchase Disclosures
Cash deposits and/or letters of credit	34,900,000	36,600,000
Aggregate purchase price	$ 488,600,000	$ 482,800,000