CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 55,845	$ 49,195
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	69,334	64,545
Amortization of above/below market leases	(339)	(251)
Amortization of deferred financing costs	1,119	786
Share-based compensation	5,812	4,171
Bad debt expense	(88)	347
Changes in operating assets and liabilities:
Accounts receivable	4,183	3,220
Deferred rent receivable	(2,667)	(2,548)
Deferred leasing costs	(5,976)	(6,758)
Other assets	(2,211)	(8,751)
Accounts payable and accrued expenses	(341)	990
Unearned revenue, prepaid rent and other liabilities	(746)	(722)
Operating leases	442	1,711
Net cash provided by operating activities	124,367	105,935
CASH FLOWS FROM INVESTING ACTIVITIES
Tenant improvements	(2,667)	(4,809)
Real estate improvements	(107,093)	(85,333)
Acquisition of CH2 land	(4,383)
Acquisition of U.S. Colo, net of cash received	(6,298)
Net cash used in investing activities	(120,441)	(90,142)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from exercise of stock options	219	4,678
Proceeds from revolving credit facility	122,500	75,000
Payments on revolving credit facility	(180,036)	(269,000)
Proceeds from unsecured debt	150,000	275,000
Payments of loan fees and costs	(4,837)	(2,410)
Dividends and distributions	(94,185)	(81,156)
Net cash provided by (used in) financing activities	(6,339)	2,112
Net change in cash and cash equivalents	(2,413)	17,905
Cash and cash equivalents, beginning of period	5,247	4,429
Cash and cash equivalents, end of period	2,834	22,334
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid for interest, net of capitalized amounts	15,419	9,271
Cash paid for operating lease liabilities	10,628	10,271
NON-CASH INVESTING AND FINANCING ACTIVITY
Construction costs payable capitalized to real estate	26,868	4,079
Accrual of dividends and distributions	51,760	46,180
NON-CASH OPERATING ACTIVITY
Lease liabilities arising from obtaining right-of-use assets	$ 96,790	$ 8,330

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