New Accounting Pronouncements - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Right-of-use assets	$ 14,058
Lease liabilities	$ 13,510
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
ASU 2016-02 | Retained Earnings
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Right-of-use assets and lease liabilities difference		261
ASU 2016-02 | Prepaid and Other Current Assets
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Right-of-use assets and lease liabilities difference		$ (74)