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Debt (U.S. Corporate Office Term Loan) (Narrative) (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 26, 2017 | Dec. 13, 2016 | Mar. 31, 2019 | Dec. 31, 2018
Debt Instrument [Line Items] |  |  |  |
Contractual facility |  |  | $ 290,879 | $ 252,929
U.S. Corporate Office Term Loan [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument term |  | 10 years |  |
Contractual facility |  | $ 8,400 | $ 9,437 | $ 9,495
Interest rate | 4.44% | 4.64% |  |
Debt increase | $ 1,500 |  |  |

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- Definition Debt Instrument Contractual Facility Borrowing Capacity + References No definition available. + Details
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- Definition Net increase or decrease in the carrying amount of the debt instrument for the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Details
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