Indebtedness - Additional Information (Detail) (USD $) | 3 Months Ended | 0 Months Ended |
Mar. 31, 2015 | Feb. 20, 2015 | Mar. 31, 2015 | Apr. 07, 2015 | Jan. 23, 2015 |
Debt Instrument [Line Items] | | | | | |
Aggregate capacity under the credit facility | | 50,000,000 | | | |
Loss on extinguishment of debt | -227,000 | | | | |
Minimum [Member] | LIBOR [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Stated interest rate, basis spread on variable rate | | 1.35% | | | |
Maximum [Member] | LIBOR [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Stated interest rate, basis spread on variable rate | | 1.95% | | | |
Revolving Credit Facility [Member] | New Credit Facility [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument maturity date | 20-Feb-19 | | | | |
Revolving credit facility, extension option | 1 year | | | | |
Revolving Credit Facility [Member] | Minimum [Member] | New Credit Facility [Member] | LIBOR [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Stated interest rate, basis spread on variable rate | 1.40% | | | | |
Revolving Credit Facility [Member] | Maximum [Member] | New Credit Facility [Member] | LIBOR [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Stated interest rate, basis spread on variable rate | 2.00% | | | | |
Term Loan Facility [Member] | New Credit Facility [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt instrument maturity date | 20-Feb-20 | | | | |
Term Loan Facility [Member] | Minimum [Member] | New Credit Facility [Member] | LIBOR [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Stated interest rate, basis spread on variable rate | 1.35% | | | | |
Term Loan Facility [Member] | Maximum [Member] | New Credit Facility [Member] | LIBOR [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Stated interest rate, basis spread on variable rate | 1.95% | | | | |
Operating Partnership [Member] | New Credit Facility [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Amount borrowed under credit facility | | 54,000,000 | 6,000,000 | | |
Repayment of term loan facility | | 50,000,000 | | | |
Repayment of other indebtedness | | 39,000,000 | | | |
Loss on extinguishment of debt | | 200,000 | | | |
Credit facility, amount outstanding | 60,000,000 | | 60,000,000 | | |
Operating Partnership [Member] | Construction Loans [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Amount borrowed under credit facility | 10,500,000 | | | | |
Operating Partnership [Member] | Subsequent Event [Member] | New Credit Facility [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Amount borrowed under credit facility | | | | 23,000,000 | |
Operating Partnership [Member] | Revolving Credit Facility [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Amount borrowed under credit facility | | | | | 5,000,000 |
Debt instrument maturity date | 13-May-16 | | | | |
Credit facility termination date | 20-Feb-15 | | | | |
Senior revolving credit facility, maximum borrowing capacity | 155,000,000 | | 155,000,000 | | |
Operating Partnership [Member] | Revolving Credit Facility [Member] | New Credit Facility [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate | 1.73% | | 1.73% | | |
Operating Partnership [Member] | Senior Unsecured Credit Facility [Member] | New Credit Facility [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Senior revolving credit facility, maximum borrowing capacity | | 200,000,000 | | | |
Operating Partnership [Member] | Senior Unsecured Revolving Credit Facility [Member] | New Credit Facility [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Senior revolving credit facility, maximum borrowing capacity | | 150,000,000 | | | |
Operating Partnership [Member] | Senior Unsecured Term Loan Facility [Member] | New Credit Facility [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Aggregate capacity under the credit facility | | 50,000,000 | | | |
Operating Partnership [Member] | Term Loan Facility [Member] | New Credit Facility [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate | 1.68% | | 1.68% | | |