Acquired Leases Intangibles (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Acquired lease intangible assets, net of amortization	$ 44,805		$ 42,459
Finite-Lived Intangible Assets, Amortization Expense	8,709		5,069		3,772
Weighted Average Accretion Period of Intangible Liabilities (in years)	13 years 4 months 28 days	[1]
Acquired lease intangible liability accretion	3,726	[1]	1,950	[1]	1,375	[1]
In-place leases, net
Finite-Lived Intangible Assets [Line Items]
Acquired lease intangible assets, net of amortization	33,049		31,314
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life (in years)	14 years 4 months 24 days
Finite-Lived Intangible Assets, Amortization Expense	7,441		4,307		3,436
Above-market leases, net
Finite-Lived Intangible Assets [Line Items]
Acquired lease intangible assets, net of amortization	10,074		9,440
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life (in years)	9 years	[2]
Finite-Lived Intangible Assets, Amortization Expense	1,246	[2]	739	[2]	319	[2]
Above-market ground leases, net
Finite-Lived Intangible Assets [Line Items]
Acquired lease intangible assets, net of amortization	1,682		1,705
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life (in years)	83 years 6 months	[2]
Finite-Lived Intangible Assets, Amortization Expense	$ 22	[2]	$ 23	[2]	$ 17	[2]

[1] Amounts are recorded as an increase to minimum rent.

[2] Amounts are recorded as a reduction to minimum rent.