Acquisitions - Summary of Fair Value as of Acquisition Date (Details) $ in Thousands	May 18, 2017 USD ($)
Calpipe Industries, Inc.
Business Acquisition [Line Items]
Fair Value	$ 62,720
Weighted Average Useful Life (Years)	10 years
Other
Business Acquisition [Line Items]
Fair Value	$ 48,476
Weighted Average Useful Life (Years)	10 years
Customer relationships | Calpipe Industries, Inc.
Business Acquisition [Line Items]
Fair Value	$ 56,124
Weighted Average Useful Life (Years)	10 years
Customer relationships | Other
Business Acquisition [Line Items]
Fair Value	$ 45,411
Weighted Average Useful Life (Years)	10 years
Other | Calpipe Industries, Inc.
Business Acquisition [Line Items]
Fair Value	$ 6,596
Weighted Average Useful Life (Years)	10 years
Other | Other
Business Acquisition [Line Items]
Fair Value	$ 3,065
Weighted Average Useful Life (Years)	6 years