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Dividends and Distribution Payable (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
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Dividends Payable [Line Items] |  |  |
Dividends Payable, Amount Per Share | $ 1.740 us-gaap_DividendsPayableAmountPerShare | $ 1.640 us-gaap_DividendsPayableAmountPerShare | $ 1.600 us-gaap_DividendsPayableAmountPerShare
Dividend Declared, Ordinary Income [Member] |  |  |
Dividends Payable [Line Items] |  |  |
Dividends Payable, Amount Per Share | $ 1.398 us-gaap_DividendsPayableAmountPerShare / us-gaap_DividendsAxis = adc_DividendDeclaredOrdinaryIncomeMember | $ 1.372 us-gaap_DividendsPayableAmountPerShare / us-gaap_DividendsAxis = adc_DividendDeclaredOrdinaryIncomeMember | $ 1.200 us-gaap_DividendsPayableAmountPerShare / us-gaap_DividendsAxis = adc_DividendDeclaredOrdinaryIncomeMember
Dividend Declared, Return of Capital [Member] |  |  |
Dividends Payable [Line Items] |  |  |
Dividends Payable, Amount Per Share | $ 0.342 us-gaap_DividendsPayableAmountPerShare / us-gaap_DividendsAxis = adc_DividendDeclaredReturnOfCapitalMember | $ 0.268 us-gaap_DividendsPayableAmountPerShare / us-gaap_DividendsAxis = adc_DividendDeclaredReturnOfCapitalMember | $ 0.400 us-gaap_DividendsPayableAmountPerShare / us-gaap_DividendsAxis = adc_DividendDeclaredReturnOfCapitalMember

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- Definition The per share amount of a dividend declared, but not paid, as of the financial reporting date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Details
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