Consolidated Balance Sheets (Unaudited) (USD $)	Mar. 31, 2015	Sep. 30, 2014
Real Estate Investments:
Land	$ 123,409,364us-gaap_Land	$ 109,858,989us-gaap_Land
Buildings and Improvements	738,170,634	634,068,423
Total Real Estate Investments	861,579,998	743,927,412
Accumulated Depreciation	(116,274,401)	(107,004,184)
Net Real Estate Investments	745,305,597us-gaap_RealEstateInvestmentPropertyNet	636,923,228us-gaap_RealEstateInvestmentPropertyNet
Cash and Cash Equivalents	25,501,314	20,474,661
Securities Available for Sale at Fair Value	52,506,095us-gaap_AvailableForSaleSecurities	59,311,403us-gaap_AvailableForSaleSecurities
Tenant and Other Receivables	1,118,394us-gaap_OtherReceivables	1,312,975us-gaap_OtherReceivables
Deferred Rent Receivable	4,622,657us-gaap_DeferredRentReceivablesNet	3,759,031us-gaap_DeferredRentReceivablesNet
Prepaid Expenses	5,428,984	2,764,795
Financing Costs, net of Accumulated Amortization of $4,113,033 and $3,710,149, respectively	5,167,972us-gaap_DeferredFinanceCostsNet	4,356,264us-gaap_DeferredFinanceCostsNet
Capitalized Lease Costs, net of Accumulated Amortization of $2,189,932 and $1,886,457, respectively	3,566,605us-gaap_DeferredCostsLeasingNet	2,741,414us-gaap_DeferredCostsLeasingNet
Intangible Assets, net of Accumulated Amortization of $10,493,808 and $9,740,983, respectively	6,725,180us-gaap_FiniteLivedIntangibleAssetsNet	6,490,881us-gaap_FiniteLivedIntangibleAssetsNet
Other Assets	5,477,622us-gaap_OtherAssets	5,622,048us-gaap_OtherAssets
TOTAL ASSETS	855,420,420us-gaap_Assets	743,756,700us-gaap_Assets
Liabilities:
Mortgage Notes Payable	347,168,540us-gaap_NotesPayable	287,796,006us-gaap_NotesPayable
Loans Payable	65,161,669us-gaap_LoansPayable	25,200,000us-gaap_LoansPayable
Accounts Payable and Accrued Expenses	3,650,804	4,930,041
Other Liabilities	8,613,580us-gaap_OtherLiabilities	5,199,571us-gaap_OtherLiabilities
Total Liabilities	424,594,593us-gaap_Liabilities	323,125,618us-gaap_Liabilities
COMMITMENTS AND CONTINGENCIES
Shareholders' Equity:
Common Stock, $0.01 Par Value Per Share: 200,000,000 Shares Authorized as of March 31, 2015 and September 30, 2014; 58,937,495 and 57,008,754 Shares Issued and Outstanding as of March 31, 2015 and September 30, 2014, respectively	589,375us-gaap_CommonStockValueOutstanding	570,088us-gaap_CommonStockValueOutstanding
Excess Stock, $0.01 Par Value Per Share: 200,000,000 Shares Authorized as of March 31, 2015 and September 30, 2014; No Shares Issued or Outstanding as of March 31, 2015 and September 30, 2014	0mnr_ExcessStockValue	0mnr_ExcessStockValue
Additional Paid-In Capital	317,963,809us-gaap_AdditionalPaidInCapital	308,945,888us-gaap_AdditionalPaidInCapital
Accumulated Other Comprehensive Income	1,278,893	121,356
Undistributed Income	0	0
Total Shareholders' Equity	430,825,827us-gaap_StockholdersEquity	420,631,082us-gaap_StockholdersEquity
TOTAL LIABILITIES & SHAREHOLDERS' EQUITY	855,420,420	743,756,700
Series A Cumulative Redeemable Preferred Stock
Shareholders' Equity:
Preferred stock, value	53,493,750	53,493,750
Series B Cumulative Redeemable Preferred Stock
Shareholders' Equity:
Preferred stock, value	$ 57,500,000	$ 57,500,000

Aggregate par or stated value of issued nonredeemable Excess Stock (or Excess Stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.

No definition available.