Notes Payable and Long-Term Debt - Real Estate Secured Term Debt (Details) (USD $)	12 Months Ended							12 Months Ended						1 Months Ended	0 Months Ended					0 Months Ended			0 Months Ended		1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 20, 2013 Kaneohe Ranch Portfolio	Dec. 31, 2013 Kaneohe Ranch Portfolio Mortgages	Dec. 20, 2013 Kaneohe Ranch Portfolio Mortgages	Dec. 20, 2013 Bridge Loan Kaneohe Ranch Portfolio	Dec. 31, 2013 LIBOR Bridge Loan Kaneohe Ranch Portfolio	Nov. 05, 2013 KDC LLC Kukui'ula Village LLC acre	Sep. 24, 2013 KDC LLC Kukui'ula Village LLC	Dec. 31, 2013 KDC LLC Kukui'ula Village LLC Mortgages	Nov. 05, 2013 KDC LLC Kukui'ula Village LLC Mortgages	Sep. 24, 2013 KDC LLC Kukui'ula Village LLC Mortgages	Sep. 17, 2013 A&B Properties, Inc Pearl City sqft	Jan. 22, 2013 Parent Company Waianae Mall sqft Building	Nov. 05, 2013 First Mortgage KDC LLC Kukui'ula Village LLC Mortgages	Sep. 24, 2013 First Mortgage KDC LLC Kukui'ula Village LLC Mortgages acre	Nov. 05, 2013 First Mortgage KDC LLC LIBOR Kukui'ula Village LLC Mortgages	Sep. 24, 2013 Second Mortgage KDC LLC Kukui'ula Village LLC Mortgages	Nov. 05, 2013 Second Mortgage KDC LLC LIBOR Kukui'ula Village LLC Mortgages	Dec. 16, 2013 First Hawaiian Bank Estates of Kahala, LLC Parcel	Dec. 16, 2013 First Hawaiian Bank Estates of Kahala, LLC Residential_Lot	Dec. 16, 2013 First Hawaiian Bank Estates of Kahala, LLC Secured Debt	Dec. 16, 2013 First Hawaiian Bank Estates of Kahala, LLC LIBOR Secured Debt	Sep. 17, 2013 Northwestern Mutual Life Insurance Company A&B Properties, Inc Pearl City Mortgages	Dec. 16, 2013 Maximum First Hawaiian Bank Estates of Kahala, LLC Secured Debt	Dec. 31, 2013 Real estate	Dec. 31, 2013 Natural Materials and Construction	Dec. 31, 2013 Agribusiness	Dec. 31, 2013 Revolving Credit Facility A and B Senior Credit Facility
Debt Instrument [Line Items]
Fair value of consideration transferred				$ 372,700,000
Number of real estate properties															10						3	15
Face amount of debt							60,000,000
LIBOR								LIBOR								LIBOR				LIBOR				LIBOR
Basis spread on variable rate								3.00%										2.85%		2.00%				2.625%
Net of debt assumed in business combination						12,000,000								59,300,000	19,700,000
Fixed rate on derivative (in percents)					5.95%
Non-recourse secured debt																							42,000,000
Required principal payments, percentage of net sales proceeds from the sale of secured properties																							70.00%
Minimum cumulative principal payments after 18 months																							18,000,000
Maturity terms for long-term debts	5 years															3 years							18 months
Maximum cumulative principal payments after 18 months																							24,000,000
One-year extension option on debt (in years)																								1 year
Maximum percentage of loan to value ratio required to be maintained (in percents)																										65.00%
Percentage ownership member in property										50.00%
Secured debt amount											44,000,000	44,000,000	51,200,000			34,600,000	41,800,000	9,400,000	9,400,000
Area of real estate property									45					415,400	170,300		45
Repayment of term loan	380,300,000	257,200,000	145,900,000													5,000,000
Required periodic payment of principal																				900,000
Debt periodic principal payment frequency																				quarter
Revolving credit maximum borrowing capacity																														350,000,000
Cash consideration														82,200,000	10,100,000
Loan interest rate (in percent)															5.39%										5.90%
Monthly payment of principal and interest															100,000										400,000
Final balloon payment															18,500,000										56,200,000
Percentage of outstanding principal balance Guarantor is reliable for upon default (in percents)															10.00%
Book values of assets being pledged as collateral																											$ 330,600,000	$ 41,200,000	$ 0