Commitments - Additional Information (Detail) $ in Thousands						1 Months Ended				12 Months Ended
	Oct. 12, 2015 T	Nov. 13, 2014 T	Nov. 30, 2012 USD ($)	Jan. 30, 2012 T	Nov. 01, 2008 USD ($)	Oct. 31, 2014	May 31, 2012	Jul. 31, 2011 T	Jan. 31, 2003	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2011	Nov. 30, 2015
Long-term Purchase Commitment [Line Items]
Annual rental fee | $										$ 22,040	$ 23,757	$ 24,116
Net book value of property leased | $										494,103	537,731
Lease Agreements
Long-term Purchase Commitment [Line Items]
Net book value of property leased | $										289,154
Eufaula | kaolin | Supplier 2
Long-term Purchase Commitment [Line Items]
Commitment effective date													Jan. 01, 2011
Purchase commitment, period													3 years
Additional purchase commitment, period													6 years
Purchase commitment amount | $										$ 968	$ 2,380	2,263
Eufaula | kaolin | Supplier 2 | After Amendment
Long-term Purchase Commitment [Line Items]
Additional purchase commitment, period							3 years
Eufaula | Minimum | kaolin | Supplier 2
Long-term Purchase Commitment [Line Items]
Purchase obligation percentage of annual requirements													70.00%
Eufaula | Minimum | kaolin | Supplier 2 | After Amendment
Long-term Purchase Commitment [Line Items]
Purchase commitment, period							5 years
Purchase obligation percentage of annual requirements							50.00%
McIntyre | Lease Agreements
Long-term Purchase Commitment [Line Items]
Lease expiration period											Jan. 01, 2021
McIntyre | Wilkinson County Development Authority
Long-term Purchase Commitment [Line Items]
Agreement entry date					Nov. 01, 2008
Annual rental fee | $					$ 50
Lease agreement period										Through November 1, 2017
McIntyre | kaolin | Supplier 3
Long-term Purchase Commitment [Line Items]
Commitment effective date									Jan. 01, 2003
Purchase commitment amount | $										$ 1,196	$ 3,245	14,823
Agreement entry date									Jan. 01, 2003
McIntyre | Minimum | kaolin | Supplier 3
Long-term Purchase Commitment [Line Items]
Purchase obligation percentage of annual requirements									80.00%
McIntyre And Toomsboro [Member] | kaolin | Supplier 3
Long-term Purchase Commitment [Line Items]
Purchase obligation percentage of annual requirements														100.00%
Marshfield, Wisconsin | Hydro sized sand
Long-term Purchase Commitment [Line Items]
Purchase commitment amount | $										0	3,997	6,922
Marshfield, Wisconsin | Frac sand
Long-term Purchase Commitment [Line Items]
Purchase commitment amount | $										$ 252	1,751
Marshfield, Wisconsin | After Amendment | Hydro sized sand
Long-term Purchase Commitment [Line Items]
Purchase commitment, commencing date				Jan. 30, 2012
Marshfield, Wisconsin | Prior Agreement | Hydro sized sand
Long-term Purchase Commitment [Line Items]
Commitment effective date								Jul. 30, 2011
Purchase commitment, period								5 years
Marshfield, Wisconsin | During 2011 | Prior Agreement | Hydro sized sand
Long-term Purchase Commitment [Line Items]
Minimum quantity to be purchased annually | T								40,000
Marshfield, Wisconsin | During 2012 | After Amendment | Hydro sized sand
Long-term Purchase Commitment [Line Items]
Minimum quantity to be purchased annually | T				150,000
Marshfield, Wisconsin | During 2012 | Prior Agreement | Hydro sized sand
Long-term Purchase Commitment [Line Items]
Minimum quantity to be purchased annually | T								100,000
Marshfield, Wisconsin | During 2013 | After Amendment | Hydro sized sand
Long-term Purchase Commitment [Line Items]
Minimum quantity to be purchased annually | T				150,000
Marshfield, Wisconsin | During 2014 | After Amendment | Hydro sized sand
Long-term Purchase Commitment [Line Items]
Minimum quantity to be purchased annually | T				350,000
Marshfield, Wisconsin | During 2015 | After Amendment | Hydro sized sand
Long-term Purchase Commitment [Line Items]
Minimum quantity to be purchased annually | T				0
Marshfield, Wisconsin | During 2015 | After Amendment | Frac sand
Long-term Purchase Commitment [Line Items]
Minimum quantity to be purchased annually | T	123,203
Marshfield, Wisconsin | During 2015 | Prior Agreement | Frac sand
Long-term Purchase Commitment [Line Items]
Minimum quantity to be purchased annually | T		300,000
Marshfield, Wisconsin | Each year after 2015 | Prior Agreement | Frac sand
Long-term Purchase Commitment [Line Items]
Minimum quantity to be purchased annually | T		400,000
Marshfield, Wisconsin | During 2016 | After Amendment | Frac sand
Long-term Purchase Commitment [Line Items]
Minimum quantity to be purchased annually | T	116,599
Marshfield, Wisconsin | 2017 and thereafter | After Amendment | Frac sand
Long-term Purchase Commitment [Line Items]
Minimum quantity to be purchased annually | T	400,000
Millen Georgia | Jenkins County Development Authority
Long-term Purchase Commitment [Line Items]
Agreement entry date			Nov. 01, 2012
Lease agreement period										Until the tenth anniversary of completion of the final phase of the facility.
Lease administrative fees | $			$ 50
Millen Georgia | Kaolin And Bauxite | Supplier 7
Long-term Purchase Commitment [Line Items]
Purchase commitment, period							5 years
Additional purchase commitment, period							5 years
Purchase commitment amount | $										$ 0	561	1,465
Agreement entry date							May 31, 2012
Millen Georgia | Kaolin And Bauxite | Supplier 8
Long-term Purchase Commitment [Line Items]
Purchase commitment, period						5 years
Additional purchase commitment, period						2 years
Purchase commitment amount | $										$ 0	$ 1,300	$ 577
Agreement entry date						Oct. 31, 2014
Millen Georgia | Minimum | Kaolin And Bauxite | Supplier 7
Long-term Purchase Commitment [Line Items]
Purchase obligation percentage of annual requirements							50.00%
Millen Georgia | Minimum | Kaolin And Bauxite | Supplier 8
Long-term Purchase Commitment [Line Items]
Purchase obligation percentage of annual requirements						50.00%