Nature Of Operations And Summary Of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Thousands  | 
3 Months Ended | 9 Months Ended | ||||||||
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Oct. 02, 2020  | 
May 01, 2020  | 
Aug. 06, 2018  | 
Sep. 30, 2020  | 
Jun. 30, 2020  | 
Mar. 31, 2020  | 
Sep. 30, 2019  | 
Jun. 30, 2019  | 
Mar. 31, 2019  | 
Sep. 30, 2020  | 
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| Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] | ||||||||||
| Aggregate cost of tender offer | $ 1,383 | $ 137 | $ 2,662 | $ 1,505 | ||||||
| Dividend annualized | $ 0.10 | |||||||||
| Dividend per quarter | $ 0.025 | |||||||||
| Dividends | $ 744 | $ 749 | $ 748 | $ 746 | ||||||
| Dividends per share | $ 0.025 | $ 0.025 | $ 0.025 | $ 0.025 | ||||||
| Dividend date declared | Aug. 06, 2018 | |||||||||
| Subsequent Event [Member] | ||||||||||
| Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] | ||||||||||
| Dividend date declared | May 01, 2020 | |||||||||
| Barnes Acquisition [Member] | Subsequent Event [Member] | ||||||||||
| Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] | ||||||||||
| Acquisition purchase price | $ 30,500 | |||||||||
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- Definition Dividends Payable, Amount Per Share, Quarterly No definition available. 
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- Definition Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] No definition available. 
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of paid and unpaid cash dividends declared for classes of stock, for example, but not limited to, common and preferred. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition The per share amount of a dividend declared, but not paid, as of the financial reporting date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Date the dividend to be paid was declared, in CCYY-MM-DD format. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Details 
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- Details 
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