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Long-Term Debt - Additional Information (Details) - USD ($)		3 Months Ended
	Jan. 29, 2019	Mar. 31, 2019	Mar. 31, 2018	Feb. 07, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term debt		$ 817,940,000			$ 456,900,000
Option indexed to issuer's equity, strike price (in dollars per share)		$ 114.92
Amortization of debt discount		$ 1,510,000	$ 0
Loans Payable
Debt Instrument [Line Items]
Long-term debt, gross		265,000,000.0
Long-term debt		263,174,000			144,064,000
Loans Payable | Amended and Restated Senior Credit Agreement
Debt Instrument [Line Items]
Face amount				$ 265,000,000.0
Revolving line of credit
Debt Instrument [Line Items]
Long-term debt		269,000,000.0			312,000,000
Remaining borrowing capacity		313,000,000.0
Revolving line of credit | Amended and Restated Senior Credit Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 585,000,000.0
Letter of Credit
Debt Instrument [Line Items]
Letters of credit outstanding, amount		3,000,000.0
Convertible Notes Payable
Debt Instrument [Line Items]
Debt Instrument, Convertible, Gross Amount of Equity Component	$ (51,600,000)
Equity component of convertible debt	39,100,000
Convertible Notes Payable | 2.625% Convertible Notes Due 2024
Debt Instrument [Line Items]
Face amount	$ 345,000,000.0
Interest rate, stated percentage	2.625%
Interest rate, effective percentage	6.14%
Interest expense, debt		$ 1,600,000
Initial conversion rate	11.2608
Conversion price (in dollars per share)	$ 88.80
Long-term Debt | Amended and Restated Senior Credit Agreement
Debt Instrument [Line Items]
Interest rate, effective percentage		4.375%
Mortgage notes
Debt Instrument [Line Items]
Long-term debt		$ 836,000			$ 836,000
Mortgage notes | Largo, Florida Mortgage
Debt Instrument [Line Items]
Long-term debt		$ 800,000
London Interbank Offered Rate (LIBOR) | Long-term Debt | Amended and Restated Senior Credit Agreement
Debt Instrument [Line Items]
Basis spread on variable rate		1.875%
Federal Funds Effective Swap Rate | Long-term Debt | Amended and Restated Senior Credit Agreement
Debt Instrument [Line Items]
Basis spread on variable rate		0.50%
Eurodollar | Long-term Debt | Amended and Restated Senior Credit Agreement
Debt Instrument [Line Items]
Basis spread on variable rate		1.00%
Call Option
Debt Instrument [Line Items]
Hedge and warrant transactions, net cash paid	$ 21,000,000.0

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