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Summary of Significant Accounting Policies - Leases (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
Adoption of new accounting pronouncements |  |  |
Lease, Practical Expedients, Package [true false] | true |  |
Operating lease right-of-use assets | $ 10,580 |  |
Operating lease liabilities | 13,935 |  |
Retained earnings | $ 181,167 |  | $ 172,378
Accounting Standards Update 2016-02 | Adjustments. |  |  |
Adoption of new accounting pronouncements |  |  |
Operating lease right-of-use assets |  | $ 9,200 |
Operating lease liabilities |  | 11,000 |
Retained earnings |  | $ 0 |

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- Definition Indicates (true false) whether practical expedients are elected for not reassessing whether any expired or existing contract is or contains lease, lease classification for expired or existing lease, and initial direct cost for any existing lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 10 -Section 65 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=119364159&loc=SL77916155-209984 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 10 -Section 65 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=119364159&loc=SL77916155-209984 + Details
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