Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash Flows From Operating Activities
Net income	$ 59,246	$ 7,282
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	96,632
Amortization of deferred finance costs and debt premiums and discount	2,559
Amortization of acquired above- and below-market leases, net	(8,480)
Amortization of acquired below-market ground leases	2,602
Straight-lining of rental revenue	(32,102)
Equity based compensation	2,908
Equity in net income of non-controlled entities	0	(14,816)
Distributions of cumulative earnings of non-controlled entities	0	3,391
Increase (decrease) in cash flows due to changes in operating assets and liabilities (excluding the effect of acquisitions):
Restricted cash	(4,689)
Tenant and other receivables	(2,475)
Deferred leasing costs	(9,049)
Prepaid expenses and other assets	4,361
Accounts payable and accrued expenses	(12,973)
Deferred revenue and other liabilities	3,094
Net cash provided by operating activities	101,634
Cash Flows From Investing Activities
Decrease (increase) in restricted cash for investing activities	5,162
Acquisition of real estate property, net of cash received	(186,588)
Development costs	(512)
Additions to building and improvements	(82,683)
Net cash used in investing activities	(264,621)
Cash Flows From Financing Activities
Proceeds from mortgage notes payable	0
Repayment of mortgage notes payable	(57,478)
Proceeds from credit facility	295,600
Repayments of credit facility	(265,000)
Proceeds from unsecured loan payable	0
Proceeds from Issuance of Senior Long-term Debt	250,000	0
Deferred financing costs and equity issuance costs	(3,192)
Deferred offering costs	0
Contributions from owners	0
Payment of Distributions	(241)	0
Distributions to Predecessor owners	0
Dividends paid to common stockholders	(24,601)
Distributions paid to non-controlling interests in the operating partnership	(39,926)
Net cash provided by financing activities	155,162
Net increase (decrease) in cash and cash equivalents	(7,825)
Cash and cash equivalents—beginning of period	60,743
Cash and cash equivalents—end of period	52,918
Supplemental disclosures of cash flow information:
Cash paid for interest	42,226
Cash paid for income taxes	2,669
Non-cash investing and financing activities:
Commercial real estate properties included in accounts payable and accrued expenses	36,192
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	379,328	0
Debt assumed	182,851	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Liabilities, Net of Other Assets	(5,155)	0
Predecessor [Member]
Cash Flows From Operating Activities
Net income		7,282
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		38,030
Amortization of deferred finance costs and debt premiums and discount		5,551
Amortization of acquired above- and below-market leases, net		0
Amortization of acquired below-market ground leases		0
Straight-lining of rental revenue		(3,383)
Equity based compensation		0
Equity in net income of non-controlled entities		(14,816)
Distributions of cumulative earnings of non-controlled entities		3,391
Increase (decrease) in cash flows due to changes in operating assets and liabilities (excluding the effect of acquisitions):
Restricted cash		(633)
Tenant and other receivables		(80)
Deferred leasing costs		(9,771)
Prepaid expenses and other assets		3,084
Accounts payable and accrued expenses		32,442
Deferred revenue and other liabilities		924
Net cash provided by operating activities		62,021
Cash Flows From Investing Activities
Decrease (increase) in restricted cash for investing activities		(500)
Acquisition of real estate property, net of cash received		0
Development costs		179
Additions to building and improvements		(56,129)
Net cash used in investing activities		(56,450)
Cash Flows From Financing Activities
Proceeds from mortgage notes payable		102,947
Repayment of mortgage notes payable		(20,049)
Proceeds from credit facility		0
Repayments of credit facility		0
Proceeds from unsecured loan payable		3,750
Deferred financing costs and equity issuance costs		(3,482)
Deferred offering costs		(6,595)
Contributions from owners		3,924
Distributions to Predecessor owners		(31,965)
Dividends paid to common stockholders		0
Distributions paid to non-controlling interests in the operating partnership		0
Net cash provided by financing activities		48,530
Net increase (decrease) in cash and cash equivalents		54,101
Cash and cash equivalents—beginning of period		51,499
Cash and cash equivalents—end of period		105,600
Supplemental disclosures of cash flow information:
Cash paid for interest		38,380
Cash paid for income taxes		0
Non-cash investing and financing activities:
Commercial real estate properties included in accounts payable and accrued expenses		$ 102