Mortgage Repurchase Facility - Additional information (Detail) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Lines Of Credit And Debt Obligations [Line Items]
Mortgage repurchase facility	$ 32,700,000	$ 32,700,000	$ 48,700,000
HomeAmerican's HUD Compare Ratio		1.50
Mortgage repurchase facility pricing rate	Mortgage Repurchase Facility carry a Pricing Rate equal to the greater of (i) the LIBOR Rate (as defined in the Mortgage Repurchase Facility) plus 2.5%, or (ii) 3.75%. At HomeAmerican’s option the Balance Funded Rate (equal to 3.75%) may be applied to advances under the Mortgage Repurchase Facility provided the applicable Buyer is holding sufficient Qualifying Balances. The Mortgage Repurchase Facility contains various representations, warranties and affirmative and negative covenants customary for agreements of this type. The negative covenants include, among others, (i) an Adjusted Tangible Net Worth requirement, (ii) a minimum Adjusted Tangible Net Worth Ratio, (iii) an Adjusted Net Income requirement, (iv) a minimum Liquidity requirement; and (v) a requirement that HomeAmerican’s HUD Compare Ratio may be no more than 1.50 to 1.00.
Maximum [Member]
Lines Of Credit And Debt Obligations [Line Items]
Maximum aggregate commitment	$ 50,000,000	$ 50,000,000
LIBOR basis spread	3.75%	3.75%
Minimum [Member]
Lines Of Credit And Debt Obligations [Line Items]
LIBOR basis spread	2.50%	2.50%