Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018
OPERATING ACTIVITIES
Net income		$ 24,403	$ 18,597
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements		27,193	21,404
Amortization of leasing costs and in-place lease intangibles		11,641	7,249
Accrued straight-line rental revenue		(2,893)	(1,789)
Amortization of leasing incentives and above or below-market rents		(287)	(211)
Amortization of right-of-use assets - finance leases		168	0
Accrued straight-line ground rent expense		(10)	187
Adjustment for uncollectable accounts		220	245
Noncash stock compensation		1,339	1,072
Impairment charges		0	101
Noncash interest expense		898	827
Interest expense on finance leases		340	0
Noncash loss on extinguishment of debt		0	11
Gain on real estate dispositions		(4,699)	0
Annapolis Junction loan discount amortization	[1]	(3,727)	0
Change in fair value of interest rate derivatives		3,926	(1,256)
Equity in income of unconsolidated real estate entities		(273)	0
Changes in operating assets and liabilities:
Property assets		(4,123)	(3,610)
Property liabilities		2,623	2,031
Construction assets		(3,452)	3,044
Construction liabilities		(642)	(13,558)
Interest receivable		(7,118)	(7,147)
Net cash provided by operating activities		45,527	27,197
INVESTING ACTIVITIES
Development of real estate investments		(107,458)	(102,183)
Tenant and building improvements		(16,889)	(8,281)
Acquisitions of real estate investments, net of cash received		(133,345)	(57,541)
Dispositions of real estate investments, net of selling costs		32,468	4,271
Notes receivable issuances		(44,531)	(10,281)
Notes receivable paydowns		16,965	0
Leasing costs		(2,569)	(4,048)
Leasing incentives		0	(95)
Contributions to equity method investments		(535)	(5,400)
Net cash used for investing activities		(255,894)	(183,558)
FINANCING ACTIVITIES
Proceeds from issuance of cumulative redeemable perpetual preferred stock, net		61,001	0
Proceeds from issuance of common stock, net		71,749	59,529
Common shares tendered for tax withholding		(344)	(343)
Debt issuances, credit facility and construction loan borrowings		349,157	274,427
Debt and credit facility repayments, including principal amortization		(200,879)	(138,122)
Debt issuance costs		(3,225)	(1,317)
Redemption of operating partnership units		0	(2,531)
Dividends on common stock and distributions on Operating Partnership units		(43,537)	(37,550)
Net cash provided by financing activities		233,922	154,093
Net increase (decrease) in cash, cash equivalents, and restricted cash		23,555	(2,268)
Cash, cash equivalents, and restricted cash, beginning of period		24,051	22,916
Cash, cash equivalents, and restricted cash, end of period	[2]	47,606	20,648
Supplemental Disclosures (noncash transactions):
Increase in dividends and distributions payable		3,949	1,610
(Decrease) increase in accrued capital improvements and development costs		(13,204)	10,103
Issuance of operating partnership units for acquisitions		71,115	1,702
Operating Partnership units redeemed for common shares		2,700	3,151
Debt assumed at fair value in conjunction with real estate purchases		101,390	0
Note receivable extinguished in conjunction with real estate purchase		31,252	0
Equity method investment redeemed for real estate acquisition		23,011	$ 0
Noncontrolling interest in acquired real estate entity		4,870
Recognition of operating lease ROU assets	[3]	33,965
Recognition of operating lease liabilities	[3]	41,631
Recognition of finance lease ROU assets		24,500
Recognition of finance lease liabilities		17,871
De-recognition of operating lease ROU assets - lease termination		440
De-recognition of operating lease liabilities - lease termination		$ 440

[1] Borrower paid $5.0 million in exchange for the Company's purchase option. This is being accounted for as a loan modification fee; interest income is being recognized as additional interest income on the note receivable over the one-year remaining term.

[2] The following table provides a reconciliation of cash, cash equivalents and restricted cash reported in the Condensed Consolidated Statements of Cash Flows (in thousands):     September 30, 2019   September 30, 2018 Cash and cash equivalents   $ 44,195
  $ 17,732
Restricted cash _(a)   3,411
  2,916
Cash, cash equivalents, and restricted cash   $ 47,606
  $ 20,648

(a) Restricted cash represents amounts held by lenders for real estate taxes, insurance, and reserves for capital improvements.

[3] Net of $0.4 million disposal related to the Company's preexisting lease at the Thames Street Wharf property acquired on June 26, 2019.