Employee Benefits - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) Installments shares	Mar. 31, 2019 USD ($) shares	Dec. 31, 2019 USD ($)
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Healthcare benefit expense, net of employee contributions	$ 7,000	$ 4,800
Accrued compensation	32,264		$ 33,636
Administration expense related to employee contribution plan	600	600
Share-based compensation expense	2,681	1,938
Unrecognized compensation expense	$ 4,300
Compensation cost not yet recognized, period for recognition	1 year 9 months 18 days
Cost of Sales [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Workers' compensation expense	$ 4,400	4,200
Share-based compensation expense	96	78
Performance Based Restricted Stock Units [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Share-based compensation expense	200	100
Unrecognized compensation expense	$ 33
Compensation cost not yet recognized, period for recognition	1 month 6 days
Performance Based Awards [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Number of shares granted | shares	57,450
2014 Omnibus Incentive Plan [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Common stock shares available for issuance | shares	2,100,000
Number of shares granted | shares	100,000
Common stock shares authorized | shares	3,000,000.0
2014 Omnibus Incentive Plan [Member] | Share-based Payment Arrangement, Nonemployee [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Share-based compensation expense	$ 33	100
Number of shares granted | shares	316
2014 Omnibus Incentive Plan [Member] | Non-Performance-Based Awards [Member] | Share-based Payment Arrangement, Employee [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Share-based compensation expense	$ 1,000	$ 1,100
Number of shares granted | shares	7,000	11,000
2014 Omnibus Incentive Plan [Member] | Officer [Member] | Performance Based Awards [Member] | Common Stock [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Share-based compensation expense	$ 1,000	$ 700
Number of equal installments for common stock | Installments	2
Unrecognized compensation expense	$ 6,900
Compensation cost not yet recognized, period for recognition	2 years 1 month 6 days
Medical IBNR Included in Accrued Compensation [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Accrued compensation	$ 2,900		$ 2,600