Other Assets (Schedule of Other Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Other Assets [Abstract]
Deferred financing costs related to the revolver portion of the unsecured credit facility, net of accumulated amortization of $4,733 and $3,690, respectively	$ 1,914	$ 2,854
Lease commissions, net of accumulated amortization of $403 and $227, respectively	4,318	4,194
Investments in unconsolidated partnerships	108	100
Tenant receivables, net of allowances for doubtful accounts of $809 and $0, respectively	10,754	5,318
Notes receivable, net of allowances for doubtful accounts of $1,666 and $0, respectively	14,853	13,000
Real estate-related notes receivable	514	514
Straight-line rent receivable	61,395	47,807
Restricted cash held in escrow	15,265	13,661
Real estate escrow deposits	0	450
Restricted cash	1,051	882
Derivative assets	0	61
Prepaid and other assets	3,357	4,207
Total other assets	113,529	93,048
Deferred financing costs, accumulated amortization	4,733	3,690
Lease commissions, accumulated amortization	403	227
Tenant receivables, allowances for doubtful accounts	809	0
Notes receivable, allowances for doubtful accounts	$ 1,666	$ 0