Supplemental Selected Quarterly Financial Data (Unaudited) - Textual (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Tax Cuts and Jobs Act of 2017, net tax benefit recognized	$ 3,400	$ 5,000	$ (1,600)
Loss from disposal of discontinued operations, net of tax			$ 0	$ (17,367)	$ 0

Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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