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Revenue Recognition and Contracts with Customers (Schedule of Consolidated Balance Sheet) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Trade accounts payable and accrued expenses | $ 33,021 | $ 32,422
Deferred revenue from contracts with customers |  | 6,950
Deferred taxes |  | 1,402
Retained earnings | 350,423 | 321,323
Adjustments due ASC 606 [Member] |  |
Trade accounts payable and accrued expenses |  | (4,000)
Deferred revenue from contracts with customers |  | 6,950
Deferred taxes |  | (723)
Retained earnings |  | (2,227)
After Adjustment [Member] |  |
Trade accounts payable and accrued expenses |  | 28,422
Deferred revenue from contracts with customers | $ 7,477 | 6,950
Deferred taxes |  | 679
Retained earnings |  | $ 319,096

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- Definition Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits. + 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 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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