Accumulated OCI - Schedule of Reclassifications Out of Accumulated OCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (23,006)	$ (1,013)	$ (54,334)	$ (7,948)
Income tax expense	$ 4,673	$ 9,029	18,157	$ 23,856
Interest Rate Swap Agreements
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net of tax			(150)
Reclassifications Out of Accumulate OCI
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income tax expense			50
Net of tax			(150)
Reclassifications Out of Accumulate OCI | Interest Rate Swap Agreements
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense			$ (200)