Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 23,418	$ 70,011	$ 12,447
Depreciation and amortization expense
Continuing operations	10,549	9,340	10,642
Discontinued operations		587	3,058
Impairment charges	21,534	13,425	13,942
Gains on dispositions of real estate
Continuing operations	(1,223)
Discontinued operations	(8,995)	(45,505)	(6,866)
Deferred rent receivable, net of allowance	(4,156)	(4,445)	(4,368)
Bad debt expense (recoveries)	1,278	(20,854)	15,903
Amortization of above-market and below-market leases	(28)	160	(285)
Amortization of credit line and term loan origination costs	1,068	1,650	3,396
Accretion expense	3,046	3,214	3,174
Stock-based employee compensation expense	917	971	757
Changes in assets and liabilities:
Accounts receivable,	(730)	20,847	(15,848)
Prepaid expenses and other assets	3,934	(201)	(8,004)
Environmental remediation obligations	(16,368)	(15,611)	(9,009)
Accounts payable and accrued liabilities	(5,007)	10,089	(3,054)
Net cash flow provided by operating activities	29,237	43,678	15,885
CASH FLOWS FROM INVESTING ACTIVITIES:
Property acquisitions and capital expenditures	(17,238)	(67,174)	(4,148)
Investment in direct financing leases		(6,267)
Proceeds from dispositions of real estate
Continuing operations	4,776
Discontinued operations	15,289	66,349	9,855
Change in cash held for property acquisitions	16,226	(16,467)	(1,615)
Change in restricted cash	287	(1,000)
Amortization of investment in direct financing leases	1,382	1,025	728
Issuance of notes, mortgages and other receivables		(4,138)	(2,972)
Collection of notes and mortgages receivable	2,783	20,825	1,703
Net cash flow provided by (used in) investing activities	23,505	(6,847)	3,551
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under credit line	3,000	130,400	4,000
Repayments under credit line	(36,000)	(222,690)	(1,410)
Borrowings under term loan		100,000
Repayments under term loan		(22,030)	(780)
Payments of capital lease obligations	(255)	(220)	(152)
Principal payments of mortgage notes	(50)
Payments of cash dividends	(28,675)	(24,419)	(8,404)
Payments of loan origination costs		(2,842)	(4,144)
Cash paid in settlement of restricted stock units			(18)
Security deposits received	314	129	650
Net cash flow (used in) financing activities	(61,666)	(41,672)	(10,258)
Change in cash and cash equivalents	(8,924)	(4,841)	9,178
Cash and cash equivalents at beginning of year	12,035	16,876	7,698
Cash and cash equivalents at end of year	3,111	12,035	16,876
Supplemental disclosures of cash flow information Cash paid during the period for:
Interest paid	8,735	9,563	6,293
Income taxes	316	173	810
Environmental remediation obligations	13,448	12,396	4,889
Non-cash transactions
Issuance of notes and mortgage receivables related to property dispositions	8,278	8,714	4,568
Mortgage payable, net related to property acquisition	$ 390