Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012 Segment Property Room		Dec. 31, 2011		Dec. 31, 2010	Mar. 29, 2012	Jun. 01, 2011	Jan. 19, 2011 Property Employee
Summary Of Significant Accounting Policies [Line Items]
Number of common stock sold, shares								31,625,000
Common stock price per share								$ 20.50
Shares of common stock issued to accredited prior investors								7,030,084
Common units of limited partnership interests issued to accredited prior investors								18,145,039
Aggregate value of common units of limited partnership interests issued to accredited prior investors								$ 516,100,000
Cash paid to non-accredited prior investors from IPO								6,100,000
Revolving credit facility								250,000,000
Maximum revolving credit facility available under specified circumstances								250,000,000
Indebtedness	1,057,680,000	[1]	927,993,000	[1]				342,000,000
Defeasance costs								24,300,000
Loan transfer and consent and credit facility origination fees								10,800,000
Loan transfer and consent and credit facility origination fees prepaid by predecessor								700,000
Net proceeds from IPO								594,600,000
IPO offering costs paid by predecessor								1,900,000
Properties of entities with controlling ownership interests								17
Properties of entities with non-controlling ownership interests								4
Investments in certain real estate joint ventures, noncontrolling ownership interests								25.00%
Number of employees								114
Office, retail, multifamily, and mixed-use Operating properties	23
Properties held for development	5
Allowance for doubtful accounts	1,200,000		1,100,000
Total bad debt expense	600,000		2,000,000		600,000
Short term liquid investments, initial maturity	3 months
Cash balance at banks, federally insured amount	250,000
Cash balance at banks, excess of FDIC insured limit	33,000,000		24,300,000
Debt issuance costs written off	600,000		600,000
Notes payable to affiliates, interest rate						3.94%	3.97%
Number of operating segments	4
Room in mixed-use segment all-suite hotel	369
Real Estate
Summary Of Significant Accounting Policies [Line Items]
Real estate depreciation expense	47,800,000		42,500,000		31,400,000
Minimum
Summary Of Significant Accounting Policies [Line Items]
Percentage of taxable income required to distribute to qualify as real estate investment trust (REIT)	90.00%
Affiliated Entity
Summary Of Significant Accounting Policies [Line Items]
Notes payable to affiliates, interest rate	10.00%
Money Market Funds
Summary Of Significant Accounting Policies [Line Items]
Cash balance at banks, excess of FDIC insured limit	900,000		82,100,000
Building And Improvement | Minimum
Summary Of Significant Accounting Policies [Line Items]
Real Estate, estimated useful lives	30 years
Building And Improvement | Maximum
Summary Of Significant Accounting Policies [Line Items]
Real Estate, estimated useful lives	40 years
Furniture And Equipment | Minimum
Summary Of Significant Accounting Policies [Line Items]
Real Estate, estimated useful lives	3 years
Furniture And Equipment | Maximum
Summary Of Significant Accounting Policies [Line Items]
Real Estate, estimated useful lives	15 years
Deferred Rent Receivables
Summary Of Significant Accounting Policies [Line Items]
Allowance for doubtful accounts	1,500,000		1,700,000
Other Income
Summary Of Significant Accounting Policies [Line Items]
General excise tax recognized, gross	3,300,000		3,000,000		1,100,000
Subject to meeting specified requirements and obtaining additional commitments
Summary Of Significant Accounting Policies [Line Items]
Maximum revolving credit facility available under specified circumstances								$ 400,000,000
Predecessor | Minimum
Summary Of Significant Accounting Policies [Line Items]
Investments in certain real estate joint ventures, noncontrolling ownership interests					25.00%
Predecessor | Maximum
Summary Of Significant Accounting Policies [Line Items]
Investments in certain real estate joint ventures, noncontrolling ownership interests					80.00%

[1] Excludes unamortized fair market value adjustment of $13.0 million and $15.9 million as of December 31, 2012 and 2011, respectively.