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Related Party Transactions and Arrangements - Due from Affiliates Narrative (Details) - USD ($)
6 Months Ended
Sep. 23, 2016
Jun. 30, 2017
Dec. 31, 2016
Related Party Transaction [Line Items]      
Due from affiliates   $ 8,085,000 $ 21,349,000
Credit Facility [Member]      
Related Party Transaction [Line Items]      
Maximum borrowing capacity   $ 2,800,000,000  
Credit Facility [Member] | Revolving Credit Facility [Member] | Minimum [Member] | LIBOR [Member]      
Related Party Transaction [Line Items]      
Basis spread on variable rate   1.00%  
Credit Facility [Member] | Revolving Credit Facility [Member] | Maximum [Member] | LIBOR [Member]      
Related Party Transaction [Line Items]      
Basis spread on variable rate   1.80%  
CCI III OP [Member] | Credit Facility [Member] | Revolving Credit Facility [Member]      
Related Party Transaction [Line Items]      
Due from affiliates   $ 4,100,000 $ 10,300,000
Maximum borrowing capacity $ 30,000,000    
Interest rate   5.25% 5.12%
CCI III OP [Member] | Credit Facility [Member] | Revolving Credit Facility [Member] | LIBOR [Member]      
Related Party Transaction [Line Items]      
Basis spread on variable rate 1.75%    
CCI III OP [Member] | Credit Facility [Member] | Revolving Credit Facility [Member] | Minimum [Member]      
Related Party Transaction [Line Items]      
Variable interest rate 2.20%    
CCI III OP [Member] | Credit Facility [Member] | Revolving Credit Facility [Member] | Maximum [Member]      
Related Party Transaction [Line Items]      
Variable interest rate 2.75%    
Excluding balances from Cole REITs [Member]      
Related Party Transaction [Line Items]      
Due from affiliates   $ 4,000,000 $ 11,000,000