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Bank Debt (Narrative) (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
May 31, 2018 | Dec. 31, 2018 | May 21, 2018 | Dec. 31, 2017
Debt Instrument [Line Items] |  |  |  |
Leverage ratio |  | 255.00% |  |
Debt service coverage ratio |  | 212.00% |  |
Debt, interest rate spread on variable rate |  | 4.00% |  |
Interest rate effective percentage |  | 6.52% |  |
Credit Agreement [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Closing costs of debt |  | $ 8.8 |  |
Deferred financing costs expensed |  | 7.4 |  | $ 3.0
Credit agreement, amount outstanding |  | 188.0 | $ 267.0 |
Borrowing capacity |  | 62.0 |  |
Liquidity |  | $ 80.0 |  |
Interest rate effective percentage |  | 6.00% |  |
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Credit Agreement [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt, interest rate spread on variable rate |  | 3.00% |  |
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Credit Agreement [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt, interest rate spread on variable rate |  | 4.50% |  |
Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt issuance costs |  | $ 5.7 |  |
Amount of debt with maximum interest rate |  | 53.0 |  |
Revolving Credit Facility [Member] | Credit Agreement [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Credit agreement, amount outstanding |  | $ 58.0 | 120.0 |
Line of credit facility, maximum borrowing capacity increase during period | $ 6.0 |  |  |
Debt maturity date |  | May 21, 2022 |  |
Revolving Credit Facility [Member] | Minimum [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt service coverage ratio |  | 125.00% |  |
Term Loan [Member] | Credit Agreement [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Credit agreement, amount outstanding |  | $ 130.0 | $ 147.0 |

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- Definition The net increase(decrease) in interest income during the period representing the allocation of deferred loan origination fees less deferred loan origination costs using the effective interest method over the term of the debt arrangement to which they pertain taking into account the effect of prepayments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -Section 30 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6378273&loc=d3e8446-111530 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6962437&loc=d3e7402-111529 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82894254&loc=d3e8622-111531 + Details
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