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Income Taxes - Summary of Changes in Liability Related to Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax Disclosure [Abstract] |  |  |  |
Unrecognized tax benefit liability, Beginning Balance | $ 4,645 | $ 4,357 | $ 4,755 |
New positions | 0 | 653 | 0 |
Prior period positions: |  |  |  |
Increases | 7 | 491 | 939 |
Decreases | (199) | (539) | (415) |
Increases from current period positions | 714 | 692 | 615 |
Lapse of statute of limitations | (69) | (781) | (1,290) |
Other | (197) | (228) | (247) |
Unrecognized tax benefit liability, Ending Balance | 4,901 | 4,645 | 4,357 |
Accrued interest and penalties | 600 | 600 | 800 | $ 1,100
State |  |  |  |
Schedule Of Unrecognized Tax Benefits [Line Items] |  |  |  |
Net operating losses | $ 0 | $ 100 | $ 300 |

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- Definition Unrecognized tax benefits increase decrease resulting from other adjustments. + References No definition available. + Details
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- Definition Unrecognized tax benefits increases resulting from new positions. + References No definition available. + Details
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- Definition Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in prior year tax returns. + References No definition available. + Details
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- Definition The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations. + 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 (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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