Long-Term Obligations and Notes Payable - Reliant Bank Revolver (Details)	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 15, 2019 USD ($)	Dec. 31, 2018 USD ($)	Mar. 30, 2018 USD ($)	Mar. 30, 2018 CAD ($)
Debt Instrument [Line Items]
Long-term debt	$ 2,067,100,000		$ 1,783,300,000
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				$ 1,000,000,000.0	$ 50,000,000.0
Long-term debt	30,000,000.0		300,000,000.0
Unused credit commitments	$ 660,200,000
Revolving Credit Facility | Line of Credit | Reliant Bank Revolver
Debt Instrument [Line Items]
Interest rate, stated percentage	4.50%	4.75%
Line of credit facility, maximum borrowing capacity	$ 50,000,000.0	$ 30,000,000.0
Unused capacity, commitment fee percentage	0.50%
Long-term debt	$ 50,000,000.0		$ 30,000,000.0
Unused credit commitments	$ 0