Lease Intangibles - Summary of the Carrying Amounts for Acquired Real Estate Leases and Assumed Real Estate Lease Obligations (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Acquired real estate leases	$ 225,266	$ 394,046
Acquired real estate leases, net	88,760	198,287
Assumed real estate lease obligations, net	4,296	26,784
Leases, Acquired-in-Place
Finite-Lived Intangible Assets [Line Items]
Acquired real estate leases	147,056	272,077
Accumulated amortization	(91,301)	(136,089)
Leases Acquired-in-Place, Above Market Lease
Finite-Lived Intangible Assets [Line Items]
Acquired real estate leases	78,210	121,969
Accumulated amortization	(45,205)	(59,670)
Leases Acquired-in-Place, Below Market Lease
Finite-Lived Intangible Assets [Line Items]
Acquired real estate leases	19,742	56,541
Accumulated amortization	$ (15,446)	$ (29,757)