Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash Flows From Operating Activities
Net income	$ 16,705	$ 7,888
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	39,227	41,418
Amortization of deferred finance costs and debt premiums and discount	220	1,220
Amortization of acquired above- and below-market leases, net	(4,231)	(5,291)
Amortization of acquired below-market ground leases	1,957	1,958
Straight-lining of rental revenue	(5,081)	(4,102)
Equity based compensation	2,097	1,694
Increase (decrease) in cash flows due to changes in operating assets and liabilities:
Restricted cash	1,474	3,179
Tenant and other receivables	3,954	10,986
Deferred leasing costs	(6,335)	(16,396)
Prepaid expenses and other assets	20,553	17,789
Accounts payable and accrued expenses	(6,415)	(6,057)
Deferred revenue and other liabilities	(4,586)	(6,905)
Net cash provided by operating activities	59,539	47,381
Cash Flows From Investing Activities
Decrease in restricted cash for investing activities	5,081	28
Development costs	(433)	(346)
Additions to building and improvements	(28,752)	(27,717)
Net cash used in investing activities	(24,104)	(28,035)
Cash Flows From Financing Activities
Proceeds from mortgage notes payable	50,000	0
Repayment of mortgage notes payable	(23,252)	(47,084)
Proceeds from unsecured revolving credit facility	0	495,000
Repayments of unsecured revolving credit facility	(40,000)	(330,000)
Repayments of term loan and credit facility	0	(470,000)
Proceeds from senior unsecured notes	0	350,000
Deferred financing costs	(1,286)	(3,558)
Private perpetual preferred unit distributions	(234)	(234)
Dividends paid to common stockholders	(10,318)	(9,406)
Distributions paid to non-controlling interests in the operating partnership	(12,590)	(13,333)
Net cash used in financing activities	(37,680)	(28,615)
Net decrease in cash and cash equivalents	(2,245)	(9,269)
Cash and cash equivalents—beginning of period	46,685	45,732
Cash and cash equivalents—end of period	44,440	36,463
Supplemental disclosures of cash flow information:
Cash paid for interest	18,909	15,742
Cash paid for income taxes	657	1,434
Non-cash investing and financing activities:
Building and improvements included in accounts payable and accrued expenses	45,594	47,533
Derivative instruments at fair values included in accounts payable and accrued expenses	19,371	0
Conversion of operating partnership units and Class B shares to Class A shares	$ 6,863	$ 19,538