Investments in Affiliates - Assets Measured at Fair Value on Nonrecurring Basis (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended				3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012		Jun. 30, 2012
Schedule of Equity Method Investments [Line Items]
Total loss for the year	$ 0.3	$ 6.6	$ 4.7
Fair Value, Measurements, Nonrecurring
Schedule of Equity Method Investments [Line Items]
Total fair value measurement as of year end			12.9
Total loss for the year			9.8		9.8
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Nonrecurring
Schedule of Equity Method Investments [Line Items]
Total fair value measurement as of year end			0
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring
Schedule of Equity Method Investments [Line Items]
Total fair value measurement as of year end			0
Significant Un-observable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring
Schedule of Equity Method Investments [Line Items]
Total fair value measurement as of year end			12.9
The Shops at Kukui'ula Investment | Fair Value, Measurements, Nonrecurring
Schedule of Equity Method Investments [Line Items]
Total fair value measurement as of year end		0
Total loss for the year		6.3
The Shops at Kukui'ula Investment | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Nonrecurring
Schedule of Equity Method Investments [Line Items]
Total fair value measurement as of year end		0
The Shops at Kukui'ula Investment | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring
Schedule of Equity Method Investments [Line Items]
Total fair value measurement as of year end		0
The Shops at Kukui'ula Investment | Significant Un-observable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring
Schedule of Equity Method Investments [Line Items]
Total fair value measurement as of year end		6.3
Santa Barbara (CA) landholdings
Schedule of Equity Method Investments [Line Items]
Total loss for the year					5.1
Santa Barbara (CA) landholdings | Fair Value, Measurements, Nonrecurring
Schedule of Equity Method Investments [Line Items]
Total fair value measurement as of year end			5.9
Total loss for the year			5.1
Santa Barbara (CA) landholdings | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Nonrecurring
Schedule of Equity Method Investments [Line Items]
Total fair value measurement as of year end			0
Santa Barbara (CA) landholdings | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring
Schedule of Equity Method Investments [Line Items]
Total fair value measurement as of year end			0
Santa Barbara (CA) landholdings | Significant Un-observable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring
Schedule of Equity Method Investments [Line Items]
Total fair value measurement as of year end			5.9
Bakersfield (CA) joint venture
Schedule of Equity Method Investments [Line Items]
Total loss for the year			4.7		4.7
Bakersfield (CA) joint venture | Fair Value, Measurements, Nonrecurring
Schedule of Equity Method Investments [Line Items]
Total fair value measurement as of year end			7.0	[1]
Total loss for the year			4.7	[1]
Impairment losses related to the write down of landholdings owned by the joint venture			3.9
Bakersfield (CA) joint venture | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Nonrecurring
Schedule of Equity Method Investments [Line Items]
Total fair value measurement as of year end			0	[1]
Bakersfield (CA) joint venture | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring
Schedule of Equity Method Investments [Line Items]
Total fair value measurement as of year end			0	[1]
Bakersfield (CA) joint venture | Significant Un-observable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring
Schedule of Equity Method Investments [Line Items]
Total fair value measurement as of year end			$ 7.0	[1]

[1] The Total Loss for the Year includes equity in losses of $3.9 million related to the write down of landholdings owned by the joint venture.