Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016		Dec. 31, 2015
Income producing property:
Land	$ 105,890		$ 94,203
Buildings and improvements	3,018,361		2,736,936
Income producing property	3,124,251		2,831,139
Less: accumulated depreciation	(662,183)		(560,837)
Net income producing property	2,462,068		2,270,302
Construction in progress and land held for development	330,983	[1]	300,939
Net real estate	2,793,051		2,571,241
Cash and cash equivalents	38,624		31,230
Rents and other receivables	11,533		9,588
Deferred rent, net	123,058		128,941
Lease contracts above market value, net	5,138		6,029
Deferred costs, net	25,776		23,774
Prepaid expenses and other assets	41,284		44,689
Total assets	3,038,464		2,815,492
Liabilities:
Unsecured Credit Facility	50,926		0
Mortgage notes payable	110,733		114,075
Unsecured Term Loan	249,036		249,172
Unsecured notes payable	837,323		834,963
Accounts payable and accrued liabilities	36,909		32,301
Construction costs payable	56,428		22,043
Accrued interest payable	11,592		11,821
Dividend and distribution payable	46,352		43,906
Lease contracts below market value, net	2,830		4,132
Prepaid rents and other liabilities	78,232		67,477
Total liabilities	1,480,361		1,379,890
Redeemable noncontrolling interests - operating partnership	591,101		479,189
Redeemable noncontrolling interests - operating partnership	591,101		479,189
Commitments and contingencies	0		0
Stockholders’ equity:
Common stock, $.001 par value, 250,000,000 shares authorized, 75,914,763 shares issued and outstanding at December 31, 2016 and 66,105,650 shares issued and outstanding at December 31, 2015	76		66
Additional paid in capital	766,732		685,042
Retained Earnings (Accumulated Deficit)	0		(79,945)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1,056)		0
Total stockholders’ equity	967,002		956,413
Total liabilities and stockholders’ equity	3,038,464		2,815,492
Series A cumulative redeemable perpetual preferred stock [Member]
Stockholders’ equity:
Preferred stock, $.001 par value, 50,000,000 shares authorized	0		185,000
Series B cumulative redeemable perpetual preferred stock [Member]
Stockholders’ equity:
Preferred stock, $.001 par value, 50,000,000 shares authorized	0		166,250
Series C cumulative redeemable perpetual preferred stock [Member]
Stockholders’ equity:
Preferred stock, $.001 par value, 50,000,000 shares authorized	201,250		0
Subsidiaries [Member]
Income producing property:
Land	105,890		94,203
Buildings and improvements	3,018,361		2,736,936
Income producing property	3,124,251		2,831,139
Less: accumulated depreciation	(662,183)		(560,837)
Net income producing property	2,462,068		2,270,302
Construction in progress and land held for development	330,983		300,939
Net real estate	2,793,051		2,571,241
Cash and cash equivalents	34,409		27,015
Rents and other receivables	11,533		9,588
Deferred rent, net	123,058		128,941
Lease contracts above market value, net	5,138		6,029
Deferred costs, net	25,776		23,774
Prepaid expenses and other assets	41,284		44,689
Total assets	3,034,249		2,811,277
Liabilities:
Unsecured Credit Facility	50,926		0
Mortgage notes payable	110,733		114,075
Unsecured Term Loan	249,036		249,172
Unsecured notes payable	837,323		834,963
Accounts payable and accrued liabilities	36,909		32,301
Construction costs payable	56,428		22,043
Accrued interest payable	11,592		11,821
Dividend and distribution payable	46,352		43,906
Lease contracts below market value, net	2,830		4,132
Prepaid rents and other liabilities	78,232		67,477
Total liabilities	1,480,361		1,379,890
Redeemable noncontrolling interests - operating partnership	591,101		479,189
Redeemable noncontrolling interests - operating partnership	591,101		479,189
Commitments and contingencies	0		0
Stockholders’ equity:
Total liabilities and stockholders’ equity	3,034,249		2,811,277
Limited partners’ capital:
Limited partners' capital	201,250
General partner’s capital, common units, 662,373 issued and outstanding at December 31, 2016 and December 31, 2015	6,645		6,021
Total partners’ capital	962,787		952,198
Subsidiaries [Member] | Series A Preferred Units [Member]
Limited partners’ capital:
Limited partners' capital	0		185,000
Subsidiaries [Member] | Series B Preferred Units [Member]
Limited partners’ capital:
Limited partners' capital	0		166,250
Subsidiaries [Member] | Series C Preferred Units [Member]
Limited partners’ capital:
Limited partners' capital	201,250		0
Subsidiaries [Member] | Common units [Member]
Limited partners’ capital:
Limited partners' capital	$ 754,892		594,927
Subsidiaries [Member] | Series A cumulative redeemable perpetual preferred stock [Member]
Limited partners’ capital:
Limited partners' capital			185,000
Subsidiaries [Member] | Series B cumulative redeemable perpetual preferred stock [Member]
Limited partners’ capital:
Limited partners' capital			$ 166,250

[1] (1)Properties located in Ashburn, VA (ACC8, ACC9, ACC10, and ACC11), Elk Grove Village, IL (CH3), Santa Clara, CA (SC1 Phase III, formerly referred to as SC2), Hillsboro, OR (OR1 and OR2) and Vaughan, ON (TOR1).