Debt Obligations - Additional Information (Detail) (USD $) In Millions, unless otherwise specified		1 Months Ended						1 Months Ended				1 Months Ended										1 Months Ended			1 Months Ended				9 Months Ended
	Sep. 30, 2012	Jan. 12, 2012 Term Loan Facility Empire Financial Services, Inc	May 16, 2012 Term Loan Facility Banc of America Commercial Mortgage, Inc.	Jun. 21, 2012 Term Loan Facility Merrill Lynch Mortgage Lending, Inc	Feb. 13, 2012 Loans Payable MetaBank Property	Feb. 13, 2012 Loans Payable Ing Life Insurance and Annuity Loan Property	Dec. 31, 2011 Loans Payable Ing Life Insurance and Annuity	Jun. 24, 2012 Loans Payable Chambers Bank	Jun. 29, 2012 Loans Payable Bank of the Ozarks	Apr. 04, 2012 Springhill Suites by Marriott Term Loan Facility Ge Capital Financing, Inc	Apr. 04, 2012 Courtyard by Marriott Term Loan Facility Ge Capital Financing, Inc	Apr. 04, 2012 Courtyard by Marriott Term Loan Facility General Electric Company	Mar. 02, 2012 Transaction One Hilton Garden Inn Term Loan Facility General Electric Capital Corporation Property	Mar. 02, 2012 Transaction Two Hilton Garden Inn Term Loan Facility General Electric Capital Corporation Property	Feb. 13, 2012 First two years Loans Payable MetaBank	Feb. 13, 2012 Year 3 Loans Payable MetaBank	Mar. 02, 2012 Year 3 Transaction One Hilton Garden Inn Term Loan Facility General Electric Capital Corporation	Mar. 02, 2012 Year 3 Transaction Two Hilton Garden Inn Term Loan Facility General Electric Capital Corporation	Feb. 13, 2012 Years 4 and 5 Loans Payable MetaBank	Mar. 02, 2012 Year 2 Transaction One Hilton Garden Inn Term Loan Facility General Electric Capital Corporation	Mar. 02, 2012 Year 2 Transaction Two Hilton Garden Inn Term Loan Facility General Electric Capital Corporation	Feb. 13, 2012 Guest Rooms Loans Payable MetaBank Property	Feb. 13, 2012 Guest Rooms Loans Payable Ing Life Insurance and Annuity Property	Jun. 29, 2012 LIBOR Loans Payable Bank of the Ozarks	Mar. 02, 2012 LIBOR Transaction One Hilton Garden Inn Term Loan Facility General Electric Capital Corporation	Mar. 02, 2012 LIBOR Transaction Two Hilton Garden Inn Term Loan Facility General Electric Capital Corporation	Jun. 29, 2012 Interest Rate After Three Years And Thereafter Loans Payable Bank of the Ozarks	Jun. 30, 2012 Revolving Credit Facility	Sep. 30, 2012 Senior Secured Revolving Credit Facility Property	Aug. 07, 2012 Senior Secured Revolving Credit Facility Property	Aug. 07, 2012 Senior Secured Revolving Credit Facility Courtyard by Marriott ElPaso Texas Property	Aug. 07, 2012 Senior Secured Revolving Credit Facility Courtyard by Marriott Arlington, Texas Property	Aug. 07, 2012 Senior Secured Revolving Credit Facility Residence Inn in Arlington, TX Property	Sep. 30, 2012 Minimum Senior Secured Revolving Credit Facility Property
Debt Instrument [Line Items]
Loan agreement principal amount		$ 19.00	$ 8.70	$ 5.40	$ 7.00	$ 67.50		$ 1.50		$ 5.25	$ 9.75		$ 5.60	$ 6.50
Fixed interest rate		6.00%	6.41%	6.384%					5.75%				5.46%	5.46%													5.50%
Maturity date		Feb. 01, 2017	Sep. 01, 2017	Aug. 01, 2016	Feb. 01, 2017	Mar. 01, 2032		Jun. 24, 2014	Jul. 10, 2017	May 01, 2017		May 01, 2017	Apr. 01, 2017	Apr. 01, 2017
Prepayment penalty of debt		1.00%				1.00%				1.00%		1.00%			3.00%	2.00%	1.00%	1.00%	1.00%	2.00%	2.00%
Date of penalty on prepayment		Jan. 13, 2013
Loan outstanding amortized period					17 years	20 years
Annual interest rate					4.95%	6.10%				6.03%		6.03%
Number of properties collateralized					2	16																197	1,639
Number of property units acquired													95	130
Fixed interest rate, period									3 years				3 years	3 years
Debt instrument, maturity duration																									90 days	90 days
Interest rate																								3.75%	5.28%	5.28%
Number of loan closed on consolidation and refinance						4
Loan outstanding principal balance							69.5		8.9
Date on which loan can be called by the lender						Mar. 01, 2019
Date on which loan can be called by the lender						Mar. 01, 2024
Date on which loan can be called by the lender						Mar. 01, 2029
Long agreement additional amount									2.6
Line of credit facility maximum borrowing capacity																												125.0
Description of limit on outstanding borrowings on revolving credit facility																													Outstanding borrowings on the revolving credit facility are limited to the least of (1) $125.0 million, (2) 60% of the aggregate appraised value of the borrowing base assets and (3) a formula related to the aggregate adjusted net operating income of the borrowing base assets securing the facility. The availability of the credit facility is also subject to a borrowing base having no fewer than 15 properties.
Line of credit maturity date																													May 16, 2015
Line of credit facility extension of maturity term																													1 year
Percentage of aggregate appraised value of borrowing base assets																													60.00%
Number of properties required as borrowing base																																		15
Number of properties included in borrowing base																													26	3
Maximum amount of borrowing permitted by the terms of credit facility																													112.0
Line of credit facility amount outstanding																													69.9
Standby letter of credit	1.3
Line of credit facility available for future use	$ 40.8
Number of units used to secure credit facility																															90	103	96