Bank Debt (Amended Credit Facility Maximum Leverage Ratio) (Details)	Dec. 31, 2018
Line of Credit Facility [Line Items]
Leverage Ratio	255.00%
Maximum [Member] | September 30, 2018 through March 31, 2019 [Member]
Line of Credit Facility [Line Items]
Leverage Ratio	375.00%
Maximum [Member] | June 30, 2019 and September 30, 2019 [Member]
Line of Credit Facility [Line Items]
Leverage Ratio	350.00%
Maximum [Member] | December 31, 2019 through September 30, 2020 [Member]
Line of Credit Facility [Line Items]
Leverage Ratio	325.00%
Maximum [Member] | December 31, 2020 through September 30, 2021 [Member]
Line of Credit Facility [Line Items]
Leverage Ratio	300.00%
Maximum [Member] | December 31, 2021 and Each Fiscal Quarter Thereafter [Member]
Line of Credit Facility [Line Items]
Leverage Ratio	275.00%