Commitments and Contingencies - Additional Information (Details) - USD ($)			12 Months Ended
	Oct. 10, 2016	Oct. 02, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Commitments And Contingencies [Line Items]
Description of expiration date for operating leases			various dates through 2030
Rent expense			$ 24,300,000	$ 17,200,000	$ 23,300,000
Capital lease obligations payable maturity year			2021
Weighted-average interest rate of capital lease obligations payable			2.30%
Net book value of capital lease obligations			$ 400,000	400,000
Loss contingency expense			8,900,000
Insurance reimbursement received			5,600,000
Payment related to loss contingency			8,900,000
Irrevocable Standby Letters of Credit
Commitments And Contingencies [Line Items]
Letter of credit			$ 4,500,000	$ 5,500,000
Revolving Credit Facility
Commitments And Contingencies [Line Items]
Revolving credit facility, borrowing capacity before increase		$ 60,000,000
Revolving credit facility, maturity date		Oct. 02, 2017
Increase revolving credit facility		$ 80,000,000
Notes payable, spread on variable prime rate		1.00%
Line of credit facility, interest rate description			Interest on the borrowings is based on the prime rate minus 1.0%
Revolving credit facility, extended maturity period	1 year
Revolving credit facility, extended maturity date	Oct. 02, 2018
Revolving credit facility, amount outstanding			$ 0