Shareholders' Equity, Noncontrolling Interests and Other Comprehensive Income - Preferred OP Units (Details)	1 Months Ended	12 Months Ended
	Jan. 31, 2016 shares	Dec. 31, 2016 USD ($) $ / shares $ / Units shares	Dec. 31, 2015 shares	Dec. 31, 2014 shares
Class of Stock [Line Items]
Limited partners' capital account, units issued and converted (in shares)		351,250	100,620	136,128
Units converted from Series A Preferred OP Units (in shares)		185,600
Denominator for Series A Preferred OP Unit conversion | $		$ 7.50
Series A Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, stated value per unit | $ / Units		1,000
Per unit conversion amount, Series A Preferred OP Units (in dollars per unit) | $ / Units		22.50
Per unit conversion annual rate, Preferred OP Units		9.00%
Limited partners' capital account, units issued and converted (in shares)		1,392
Common Shares
Class of Stock [Line Items]
Issuance of Common Shares, net of issuance costs (in Shares)		4,830,000	1,600,000
Operating Partnership, as General Partner or Managing Member [Member]
Class of Stock [Line Items]
Preferred OP Units (in shares)		3,365,668	2,931,198
Operating Partnership, as General Partner or Managing Member [Member] | Series A Preferred Stock [Member]
Class of Stock [Line Items]
Preferred OP Units (in shares)		188	188	188
Gotham Plaza [Member] | Common Shares
Class of Stock [Line Items]
Issuance of Common Shares, net of issuance costs (in Shares)	442,478
Share price | $ / shares		$ 100.00
Preferred quarterly distribution per share price | $ / shares		$ 0.9375
Number of convertible units if share price falls below $28.80 (in shares0		3.4722
Number of convertiable units of share price falls above $35.20 (in Shares)		2.8409
Gotham Plaza [Member] | Preferred OP Units [Member]
Class of Stock [Line Items]
Issuance of Common Shares, net of issuance costs (in Shares)	141,593
Minimum [Member] | Gotham Plaza [Member] | Preferred OP Units [Member]
Class of Stock [Line Items]
Share price at conversion date | $ / shares		$ 28.80
Maximum [Member] | Gotham Plaza [Member] | Preferred OP Units [Member]
Class of Stock [Line Items]
Share price at conversion date | $ / shares		$ 35.20