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SCHEDULE II (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Allowance for Credit Losses |  |  |
Balance at Beginning of Period | $ 1,691 | $ 1,354 | $ 1,525
Charged to (Reduction of) Costs and Expenses | 223 | 437 | 189
Taken Against Allowance | (232) | (100) | (360)
Other (Deductions) Recoveries | 0 | 0 | 0
Balance at End of Period | 1,682 | 1,691 | 1,354
Valuation on Allowance for Deferred Tax Assets |  |  |
Balance at Beginning of Period | 14,625 | 16,889 | 8,754
Charged to (Reduction of) Costs and Expenses | (39) | 656 | 8,135
Taken Against Allowance | (5,336) | (2,920) | 0
Other (Deductions) Recoveries | 0 | 0 | 0
Balance at End of Period | $ 9,250 | $ 14,625 | $ 16,889

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