Finance Receivables (Narratives) (Details) (USD $)	12 Months Ended					12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 CPA: 15	Sep. 28, 2012 CPA: 15 lease	Dec. 31, 2011 Impairment Charges	Dec. 31, 2013 Minimum	Dec. 31, 2013 Maximum	Dec. 31, 2013 Level 3 Fair Value, Measurements, Nonrecurring	Dec. 31, 2012 Level 3 Fair Value, Measurements, Nonrecurring	Dec. 31, 2011 Level 3 Fair Value, Measurements, Nonrecurring	Dec. 31, 2013 Level 3 Fair Value, Measurements, Nonrecurring Continuing Operations [Member]	Dec. 31, 2012 Level 3 Fair Value, Measurements, Nonrecurring Continuing Operations [Member]	Dec. 31, 2011 Level 3 Fair Value, Measurements, Nonrecurring Continuing Operations [Member]	Dec. 31, 2013 Net Investments In Direct Financing Lease [Member] Level 3 Fair Value, Measurements, Nonrecurring Continuing Operations [Member]	Dec. 31, 2012 Net Investments In Direct Financing Lease [Member] Level 3 Fair Value, Measurements, Nonrecurring Continuing Operations [Member]	Dec. 31, 2011 Net Investments In Direct Financing Lease [Member] Level 3 Fair Value, Measurements, Nonrecurring Continuing Operations [Member]	Dec. 31, 2013 Real Estate	Dec. 31, 2012 Real Estate	Dec. 31, 2011 Real Estate	Dec. 31, 2013 Finance Leases	Dec. 31, 2012 Finance Leases	Dec. 31, 2011 Finance Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reclassification from real estate																		$ 13,952,000	$ 0	$ 17,651,000	$ (13,952,000)	$ 0	$ (17,651,000)
Finance Receivables
Proceeds from sale of direct financing lease	5,500,000	2,000,000
Gain (loss) on sale of direct financing lease	(300,000)	(200,000)
Impairment Charges									31,813,000	32,872,000	10,679,000	24,550,000	9,910,000	(1,159,000)	68,000	0	(1,608,000)
Number of DFL acquired from Merger					15
Net investments in direct financing leases	363,420,000	376,005,000		315,789,000	315,789,000
Out of period adjustment			$ 200,000			$ (1,600,000)
Financing receivable credit quality additional information	We generally seek investments in facilities that we believe are critical to a tenant’s business and that we believe have a low risk of tenant defaults. At both December 31, 2013 and 2012, none of our finance receivables were past due and we had not established any allowances for credit losses.
Financing receivable credit quality range of dates ratings updated	The credit quality evaluation of our finance receivables was last updated in the fourth quarter of 2013.
Deferred financing receivable term							3 years	8 years