Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 segment	Dec. 31, 2012	Dec. 31, 2011
Summary of Significant Accounting Policies
Percentage of interest in subsidiaries	100.00%
Real Estate Properties
Increases (decreases) to rental income from amortization of capitalized above market and below market leases	$ (1,123)	$ (2,056)	$ (725)
Amortization of the value of leases	21,608	19,507	13,071
Capitalized value of leases	142,266	144,402
Deferred Financing Fees
Deferred financing fees, gross	9,335	9,335
Accumulated amortization of deferred financing fees	5,424	3,617
Future amortization of deferred financing fees
2014	1,807
2015	1,536
2016	449
2017	45
2018	33
Thereafter	41
Segment Reporting
Number of business segments	1
Maximum | Buildings and improvements
Real Estate Properties
Estimated useful lives	40 years
Maximum | Personal property
Real Estate Properties
Estimated useful lives	12 years
In place leases
Real Estate Properties
Amortization of the value of leases	20,482	17,390	12,182
Continuing operations
Projected future amortization of net intangible lease assets and liabilities, excluding those classified as discontinued operations
2014	23,566
2015	21,209
2016	18,453
2017	16,174
2018	13,521
Thereafter	30,259
Deferred Leasing Costs
Deferred leasing costs, gross	13,935	9,134
Accumulated amortization of deferred leasing costs	2,317	1,514
Revenue Recognition
Increase in rental income to record revenue on straight line basis	2,739	3,428	1,565
Straight line rent receivables (liabilities)	10,515	7,776
Continuing operations | In place leases
Real Estate Properties
Capitalized value of leases	167,256	148,372
Accumulated amortization of capitalized lease values	49,207	32,669
Continuing operations | Above market lease
Real Estate Properties
Capitalized value of leases	38,487	39,591
Accumulated amortization of capitalized lease values	14,271	10,892
Continuing operations | Below market lease
Real Estate Properties
Capitalized value of leases	27,304	28,408
Accumulated amortization of capitalized lease values	8,220	9,279
Discontinued operations
Future amortization of deferred leasing costs, excluding those classified as discontinued operations
2014	1,913
2015	1,844
2016	1,653
2017	1,232
2018	1,105
Thereafter	$ 3,871