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Equity-Method Investment (Equity-Method Investment Recorded in Consolidated Statements of Operations) (Details) - NMTC Program - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Schedule of Equity Method Investments [Line Items]        
Asset impairments to write investment down to fair value $ 0 $ 3,498 $ 0 $ 10,494
Our portion of the partnership’s operating losses 0 2,066 0 6,197
Non-cash interest expense related to the amortization of the discounted fair value of future equity contributions 0 31 0 185
Tax benefits and credits generated $ 0 $ 7,592 $ 0 $ 20,374