CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Sep. 30, 2013	Dec. 31, 2012
ASSETS
Investment in real estate	$ 382,779,000	$ 370,647,000
Cash and cash equivalents	22,831,000	165,980,000
Investments	146,051,000	0
Notes receivable, net	7,898,000	3,975,000
Pledged treasury securities	26,404,000	26,818,000
Prepaid pension asset	35,324,000	33,356,000
Property and equipment, net of accumulated depreciation of $38.2 million and $37.6 million at September 30, 2013 and December 31, 2012, respectively	11,655,000	12,149,000
Deferred tax asset	12,046,000	11,957,000
Other assets	22,084,000	20,639,000
Total assets	667,072,000	645,521,000
LIABILITIES:
Debt	37,832,000	36,062,000
Accounts payable	14,761,000	14,773,000
Accrued liabilities and deferred credits	53,151,000	42,352,000
Total liabilities	105,744,000	93,187,000
EQUITY:
Common stock, no par value; 180,000,000 shares authorized; 92,314,092 and 92,302,299 issued at September 30, 2013 and December 31, 2012, respectively; 92,293,823 and 92,285,408 outstanding at September 30, 2013 and December 31, 2012, respectively	892,027,000	891,798,000
Accumulated deficit	(326,431,000)	(330,861,000)
Accumulated other comprehensive loss	(7,375,000)	(8,652,000)
Treasury stock at cost, 20,269 and 16,891 shares held at September 30, 2013 and December 31, 2012, respectively	(285,000)	(260,000)
Total stockholders' equity	557,936,000	552,025,000
Noncontrolling interest	3,392,000	309,000
Total equity	561,328,000	552,334,000
Total liabilities and equity	667,072,000	645,521,000
Variable Interest Entities
ASSETS
Investment in real estate	16,191,000	0
Cash and cash equivalents	2,203,000	2,107,000
Other assets	344,000	166,000
Total assets	18,738,000	2,273,000
LIABILITIES:
Accounts payable and accrued liabilities	7,344,000	1,073,000
Total liabilities	$ 7,344,000	$ 1,073,000