Long-Term Debt - Additional information (Detail)			3 Months Ended			4 Months Ended	9 Months Ended
	Sep. 27, 2017 USD ($)	May 22, 2017 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Apr. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
Redemption price percentage of principal amount of notes redeemed		100.00%
Required offer price to repurchase senior notes if change of control repurchase event							101.00%
Maximum consolidated debt reduction for unrestricted cash and cash equivalents for debt covenant calculation							$ 200,000,000
Additional interest expense				$ 369,000	$ 344,000		1,089,000	$ 1,016,000
Scenario, Forecast
Debt Instrument [Line Items]
Increase in interest expense due to ongoing amortization of the terminated value of the swap agreements			$ 350,000			$ 460,000
Minimum
Debt Instrument [Line Items]
Reduction of consolidated debt in the debt ratio calculation							$ 50,000,000
Including Acquisition Bridge Debt | Maximum
Debt Instrument [Line Items]
Debt covenant				3.50			3.50
Excluding Acquisition Bridge Debt | Maximum
Debt Instrument [Line Items]
Debt covenant				3.75			3.75
Revolving Facility
Debt Instrument [Line Items]
Credit facility commitment				$ 700,000,000			$ 700,000,000
Senior unsecured revolving facility, maturity period							5 years
Outstanding letters of credit				1,962,900	2,507,000		$ 1,962,900	2,507,000	$ 2,507,000
Floating Rate Notes, Due 2020
Debt Instrument [Line Items]
Senior notes, principal amount		$ 300,000,000
Maturity year		2020					2020
Debt instrument, maturity date							May 22, 2020
3.45% Senior Notes, Due 2027
Debt Instrument [Line Items]
Senior notes, principal amount		$ 300,000,000
Maturity year		2027
Interest rate on notes		3.45%
Trade Receivable Facility
Debt Instrument [Line Items]
Credit facility commitment	$ 300,000,000
Debt instrument maturity period	Sep. 26, 2018
Credit facility borrowing base				$ 402,754,000	$ 420,044,000		$ 402,754,000	$ 420,044,000	$ 333,302,000
6.65% Senior Notes, Due 2018
Debt Instrument [Line Items]
Maturity year							2018
Interest rate on notes				6.60%			6.60%
Debt instrument, maturity date							Apr. 15, 2018
Debt instrument maturity, description							The 6.60% Senior Notes, due 2018, have been classified as a noncurrent liability as the Company has the intent and ability to refinance on a long-term basis before or at its maturity on April 15, 2018.
Three-month LIBOR | Floating Rate Notes, Due 2020
Debt Instrument [Line Items]
Basis spread on variable rate		0.65%
London Interbank Offered Rate(LIBOR) | Trade Receivable Facility
Debt Instrument [Line Items]
Basis spread on variable rate							0.725%
Debt Instrument, Redemption, Period One | 3.45% Senior Notes, Due 2027
Debt Instrument [Line Items]
Debt instrument, redemption description							The 3.450% Senior Notes may be redeemed in whole or in part prior to March 1, 2027 at a make-whole redemption price
Debt Instrument, Redemption, Period Two | 3.45% Senior Notes, Due 2027
Debt Instrument [Line Items]
Debt instrument, redemption description							or on or after March 1, 2027 at a redemption price equal to 100% of the principal amount of the notes to be redeemed, in either case plus unpaid interest, if any, accrued thereon to, but excluding, the date of redemption.