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Long-Term Debt and Related Matters (Narrative - North America) (Details) |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Nov. 07, 2016 USD ($) | Jun. 29, 2016 USD ($) | Jun. 30, 2018 USD ($) | Dec. 31, 2017 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2018 USD ($) | Dec. 31, 2018 USD ($)
Line of Credit Facility |  |  |  |  |  |  |
Line of credit facility, amount outstanding |  |  |  | $ 128,470,000 |  |  | $ 74,008,000
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 195,000,000 | $ 275,000,000 |  |  |  |  |
Term loan | $ 30,000,000 |  |  |  |  |  |
Leverage ratio in seventh quarter | 4.25 |  |  |  |  |  |
Leverage ratio in effect for the eighth quarter and remainder of a credit agreement | 3.75 |  |  |  |  |  |
EBITDA required |  |  |  |  | $ 18,500,000 |  |
EBITDA required for seventh quarter |  |  |  |  |  | $ 31,000,000 |
Fixed charge coverage ratio |  |  |  | 1.00 |  |  |
Fixed charge coverage ratio after fifth quarter |  |  |  |  |  |  | 1.25
Liquidity covenant |  |  | $ 25,000,000 |  |  |  |
Maximum dividends allowed | $ 1,700,000 | 4,000,000 |  |  |  |  |
Loans and advances limit | 5,000,000 | 10,000,000 |  |  |  |  |
Maximum asset sales allowed | $ 25,000,000 | 25,000,000 |  |  |  |  |
Carryover of asset sales allowed |  | $ 15,000,000 |  |  |  |  |
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Euro-rate |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate | 3.25% |  |  |  |  |  |
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Euro-rate | Lowest Tier |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate | 2.50% |  |  |  |  |  |
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Base Rate |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate | 2.25% |  |  |  |  |  |
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Base Rate | Lowest Tier |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate | 1.50% |  |  |  |  |  |
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |
Line of credit facility, amount outstanding |  |  |  | $ 425,000 |  |  | $ 425,000
Line of credit facility, current borrowing capacity |  |  |  | $ 41,105,000 |  |  | $ 120,567,000

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