| **Supplemental Information for the Statement of Cash Flows** | 12 Months Ended                                                                                                                                                                                          |
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| **Cash and Cash Equivalents [Abstract]**                     |                                                                                                                                                                                                     |
| Supplemental Information for the Statement of Cash Flows     | Supplemental information for the statement of cash flows202020192018Cash operating activities:Interest paid$31,095 $50,578 $42,305 Income taxes paid80,849 104,326 87,879  |

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| - References
No definition available.
+ Details**Name:**us-gaap_CashAndCashEquivalentsAbstract**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
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| - Definition
The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.
+ References
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -URI http://asc.fasb.org/topic&trid=2134446
+ Details**Name:**us-gaap_CashFlowSupplementalDisclosuresTextBlock**Namespace Prefix:**us-gaap_**Data Type:**nonnum:textBlockItemType**Balance Type:**na**Period Type:**duration |