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Debt (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013
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Debt Instrument [Line Items] |  |
Mortgages Notes Payable | $ 106,762,238 us-gaap_SecuredDebt | $ 113,897,759 us-gaap_SecuredDebt
June 11 2016 [Member] |  |
Debt Instrument [Line Items] |  |
Mortgages Notes Payable | 8,580,000 us-gaap_SecuredDebt / adc_DueDateAxis = adc_June112016Member | 8,580,000 us-gaap_SecuredDebt / adc_DueDateAxis = adc_June112016Member
February 2017 [Member] |  |
Debt Instrument [Line Items] |  |
Mortgages Notes Payable | 2,405,976 us-gaap_SecuredDebt / adc_DueDateAxis = adc_February2017Member | 3,405,384 us-gaap_SecuredDebt / adc_DueDateAxis = adc_February2017Member
May 14 2017 [Member] |  |
Debt Instrument [Line Items] |  |
Mortgages Notes Payable | 21,398,078 us-gaap_SecuredDebt / adc_DueDateAxis = adc_May142017Member | 22,017,758 us-gaap_SecuredDebt / adc_DueDateAxis = adc_May142017Member
April 4 2018 [Member] |  |
Debt Instrument [Line Items] |  |
Mortgages Notes Payable | 25,000,000 us-gaap_SecuredDebt / adc_DueDateAxis = adc_April42018Member | 25,000,000 us-gaap_SecuredDebt / adc_DueDateAxis = adc_April42018Member
January 2020 [Member] |  |
Debt Instrument [Line Items] |  |
Mortgages Notes Payable | 7,896,078 us-gaap_SecuredDebt / adc_DueDateAxis = adc_January2020Member | 9,149,944 us-gaap_SecuredDebt / adc_DueDateAxis = adc_January2020Member
February 2020 [Member] |  |
Debt Instrument [Line Items] |  |
Mortgages Notes Payable | 3,204,294 us-gaap_SecuredDebt / adc_DueDateAxis = adc_February2020Member | 3,275,170 us-gaap_SecuredDebt / adc_DueDateAxis = adc_February2020Member
January 1 2023 [Member] |  |
Debt Instrument [Line Items] |  |
Mortgages Notes Payable | 23,640,000 us-gaap_SecuredDebt / adc_DueDateAxis = adc_January12023Member | 23,640,000 us-gaap_SecuredDebt / adc_DueDateAxis = adc_January12023Member
September 2023 [Member] |  |
Debt Instrument [Line Items] |  |
Mortgages Notes Payable | 5,595,327 us-gaap_SecuredDebt / adc_DueDateAxis = adc_September2023Member | 0 us-gaap_SecuredDebt / adc_DueDateAxis = adc_September2023Member
July 2026 [Member] |  |
Debt Instrument [Line Items] |  |
Mortgages Notes Payable | 9,042,485 us-gaap_SecuredDebt / adc_DueDateAxis = adc_July2026Member | 9,557,942 us-gaap_SecuredDebt / adc_DueDateAxis = adc_July2026Member
June 2014 [Member] |  |
Debt Instrument [Line Items] |  |
Mortgages Notes Payable | $ 0 us-gaap_SecuredDebt / adc_DueDateAxis = adc_June2014Member | $ 9,271,561 us-gaap_SecuredDebt / adc_DueDateAxis = adc_June2014Member

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- Definition Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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