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Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |  |  |
Effective Income Tax Rate, Percent | 21.20% | (0.70%) |
Valuation Allowance [Abstract] |  |  |
Valuation Allowance, Amount | $ 0 |  | $ 0
Income Tax Uncertainties [Abstract] |  |  |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 3,500 |  | 3,600
Unrecognized Tax Benefits, Period Increase (Decrease) | (100) | $ (1,200) |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | 900 |  | $ 1,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense | (100) | $ (800) |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Balance beginning of period | 4,585 |  |
Additions based on tax positions related to current year | 406 |  |
Additions for tax positions of prior years | 124 |  |
Reductions for tax positions of prior years | (60) |  |
Reductions due to lapse of applicable statute of limitations | (533) |  |
Settlements | (60) |  |
Balance end of period | 4,462 |  |
Maximum [Member] |  |  |
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |  |  |
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound | 1,100 |  |
Minimum [Member] |  |  |
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |  |  |
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound | $ 100 |  |

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- Definition The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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