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Acquisition - Preliminary Cash Purchase Price (Details) - USD ($)	Apr. 13, 2018	Dec. 29, 2018	Mar. 31, 2018
Cedar Creek
Business Acquisition [Line Items]
Payments to Cedar Creek shareholders	$ 166,447,000
Subordinated unsecured note (due to shareholder)	13,743,000
Seller’s transaction costs paid by Company	7,349,000
Add: pay off of Cedar Creek debt	174,213,000
Total preliminary cash purchase price	361,752,000
Note payable to shareholder	13,700,000
Subordinated debt	10,000,000
Interest payable	3,700,000
Line of Credit | Revolving Credit Facility
Business Acquisition [Line Items]
Line of credit facility, maximum borrowing capacity		$ 750,000,000	$ 335,000,000
Long-term line of credit facility		$ 333,300,000
Line of Credit | Revolving Credit Facility | Cedar Creek
Business Acquisition [Line Items]
Line of credit facility, maximum borrowing capacity	600,000,000.0
Term Loan | Secured Debt
Business Acquisition [Line Items]
Long-term line of credit facility	$ 180,000,000.0

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