CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Jun. 30, 2013	Dec. 31, 2012
ASSETS
Investment in real estate	$ 379,755,000	$ 370,647,000
Cash and cash equivalents	54,183,000	165,980,000
Investments	114,519,000	0
Notes receivable, net	4,771,000	3,975,000
Pledged treasury securities	26,541,000	26,818,000
Prepaid pension asset	35,548,000	33,356,000
Property and equipment, net of accumulated depreciation of $37.6 million	11,884,000	12,149,000
Deferred tax asset	11,953,000	11,957,000
Other assets	23,370,000	20,639,000
Total assets	662,524,000	645,521,000
LIABILITIES:
Debt	38,206,000	36,062,000
Accounts payable	17,469,000	14,773,000
Accrued liabilities and deferred credits	50,623,000	42,352,000
Total liabilities	106,298,000	93,187,000
EQUITY:
Common stock, no par value; 180,000,000 shares authorized; 92,314,092 and 92,302,299 issued at June 30, 2013 and December 31, 2012, respectively; 92,293,823 and 92,285,408 outstanding at June 30, 2013 and December 31, 2012, respectively	892,037,000	891,798,000
Accumulated deficit	(330,628,000)	(330,861,000)
Accumulated other comprehensive loss	(6,938,000)	(8,652,000)
Treasury stock at cost, 20,269 and 16,891 shares held at June 30, 2013 and December 31, 2012, respectively	(285,000)	(260,000)
Total stockholders' equity	554,186,000	552,025,000
Noncontrolling interest	2,040,000	309,000
Total equity	556,226,000	552,334,000
Total liabilities and equity	662,524,000	645,521,000
Variable Interest Entities
ASSETS
Investment in real estate	9,472,000	0
Cash and cash equivalents	2,139,000	2,107,000
Other assets	369,000	166,000
Total assets		2,273,000
LIABILITIES:
Accounts payable and accrued liabilities	4,657,000	1,073,000
Total liabilities		$ 1,073,000