Notes Payable and Long-Term Debt (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Notes payable and long-term debt
Total debt	706.0		$ 710.7
Less debt (premium) discount	(0.4)		(1.8)
Total debt (contractual)	705.6		708.9
Less current portion	(74.5)		(105.2)
Add debt premium (discount)	0.4		1.8
Long-term debt	631.5		605.5
Revolving Credit loans, (2.37% for 2014 and 2.53% for 2013)
Notes payable and long-term debt
Total debt	169.8		112.1
Loan interest rate (in percent)	2.37%		2.53%
6.90%, payable through 2020
Notes payable and long-term debt
Total debt	80.0		85.0
Loan interest rate (in percent)	6.90%		6.90%
5.55%, payable through 2026
Notes payable and long-term debt
Total debt	50.0		50.0
Loan interest rate (in percent)	5.55%		5.55%
5.53%, payable through 2024
Notes payable and long-term debt
Total debt	37.5		37.5
Loan interest rate (in percent)	5.53%		5.53%
5.56%, payable through 2026
Notes payable and long-term debt
Total debt	25.0		25.0
Loan interest rate (in percent)	5.56%		5.56%
3.90%, payable through 2024
Notes payable and long-term debt
Total debt	75.0		75.0
Loan interest rate (in percent)	3.90%		3.90%
4.35%, payable through 2026
Notes payable and long-term debt
Total debt	25.0		25.0
Loan interest rate (in percent)	4.35%		4.35%
4.15%, payable through 2024, secured by Pearl Highlands Center
Notes payable and long-term debt
Total debt	93.6	[1]	61.8	[1]
Loan interest rate (in percent)	4.15%		4.15%
2.08%, payable through 2021, secured by Kailua Town Center III
Notes payable and long-term debt
Total debt	11.2	[2]	11.3	[2]
Fixed rate on derivative (in percent)	5.95%
Loan interest rate (in percent)	2.08%		2.08%
2.82%, payable through 2016, secured by The Shops at Kukui'ula
Notes payable and long-term debt
Total debt	40.5	[3]	44.0	[3]
Loan interest rate (in percent)	2.82%		2.82%
2.78%, payable through 2016, secured by Kahala Estate Properties
Notes payable and long-term debt
Total debt	35.2	[4]	42.0	[4]
Loan interest rate (in percent)	2.78%		2.78%
5.39%, payable through 2015, secured by Waianae Mall
Notes payable and long-term debt
Total debt	19.1		19.9
Loan interest rate (in percent)	5.39%		5.39%
5.19%, payable through 2019
Notes payable and long-term debt
Total debt	10.2		11.9
Loan interest rate (in percent)	5.19%		5.19%
6.38%, payable through 2017, secured by Midstate Hayes
Notes payable and long-term debt
Total debt	8.3		8.3
Loan interest rate (in percent)	6.38%		6.38%
1.17%, payable through 2021, secured by asphalt plant
Notes payable and long-term debt
Total debt	8.0	[5]	8.9	[5]
Fixed rate on derivative (in percent)	5.98%
Loan interest rate (in percent)	1.17%		1.17%
1.85%, payable through 2017
Notes payable and long-term debt
Total debt	7.9		10.7
Loan interest rate (in percent)	1.85%		1.85%
3.31%, payable through 2018
Notes payable and long-term debt
Total debt	6.3		8.0
Loan interest rate (in percent)	3.31%		3.31%
2.00%, payable through 2018
Notes payable and long-term debt
Total debt	2.2		2.9
Loan interest rate (in percent)	2.00%		2.00%
2.65%, payable through 2016
Notes payable and long-term debt
Total debt	1.2		1.8
Loan interest rate (in percent)	2.65%		2.65%
5.50%, payable through 2014, secured by Little Cottonwood Center
Notes payable and long-term debt
Total debt	0		6.1
Loan interest rate (in percent)	5.50%		5.50%
5.88%, payable through 2014, secured by Midstate 99 Distribution Ctr.
Notes payable and long-term debt
Total debt	0		3.2
Loan interest rate (in percent)	5.88%		5.88%
3.05%, payable through 2014, secured by Maui Mall
Notes payable and long-term debt
Total debt	0	[6]	60.0	[6]
Loan interest rate (in percent)	3.05%		3.05%
5.00%, payable through 2014
Notes payable and long-term debt
Total debt	0		$ 0.3
Loan interest rate (in percent)	5.00%		5.00%
LIBOR | 2.08%, payable through 2021, secured by Kailua Town Center III
Notes payable and long-term debt
LIBOR	LIBOR
Basis spread on variable rate	1.50%
LIBOR | 2.82%, payable through 2016, secured by The Shops at Kukui'ula
Notes payable and long-term debt
LIBOR	LIBOR
Basis spread on variable rate	2.66%
LIBOR | 2.78%, payable through 2016, secured by Kahala Estate Properties
Notes payable and long-term debt
LIBOR	LIBOR
Basis spread on variable rate	2.625%
LIBOR | 1.17%, payable through 2021, secured by asphalt plant
Notes payable and long-term debt
LIBOR	LIBOR
Basis spread on variable rate	1.00%
LIBOR | 3.05%, payable through 2014, secured by Maui Mall
Notes payable and long-term debt
Basis spread on variable rate	3.00%

[1] On December 1, 2014, the Company refinanced and increased the amount of the loan secured by Pearl Highlands Center.

[2] Loan has a stated interest rate of LIBOR plus 1.5%, but is swapped through maturity to a 5.95% fixed rate.

[3] Loan has a stated interest rate of LIBOR plus 2.66%.

[4] Loan has a stated interest rate of LIBOR plus 2.63%.

[5] Loan has a stated interest rate of LIBOR plus 1.0%, but is swapped through maturity to a 5.98% fixed rate

[6] Loan has a stated interest rate of LIBOR plus 3.00%. The loan was used as temporary financing for the acquisition of the Kailua Portfolio in December 2013. The loan was paid off with reverse 1031 proceeds from Maui Mall on January 6, 2014.