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New Accounting Pronouncements - Additional Information (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Jan. 01, 2019
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New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Right-of-use assets | $ 13,267 |
Lease liabilities | $ 12,772 |
ASU 2016-02 |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Right-of-use assets |  | $ 17,146
Lease liabilities |  | 16,697
Right-of-use assets and lease liabilities difference |  | 449
Right-of-use assets and lease liabilities difference, net of tax effects |  | 114
Retained Earnings | ASU 2016-02 |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Right-of-use assets and lease liabilities difference |  | 261
Prepaid and Other Current Assets | ASU 2016-02 |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Right-of-use assets and lease liabilities difference |  | $ (74)

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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