Basis and Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) - Accounting Standards Update 2016-02 - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Opening Balance Sheet Adjustment - ASC 842, net of taxes	$ 2,592
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Opening Balance Sheet Adjustment - ASC 842, net of taxes	$ 2,592	$ 2,612

Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant