Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Tables)

v3.19.1
Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases
Aggregate future minimum payments under the Company's non-cancelable operating, capital spend commitments and minimum purchase commitments as of December 31, 2018 are as follows (in thousands):
Year ended December 31:
Operating Leases
 
Capital Spend Commitments
 
Minimum Purchase Commitments(a)
2019
$
20,161

 
$
10,557

 
$
32,483

2020
16,579

 
—

 
19,679

2021
12,567

 
—

 
501

2022
9,329

 
—

 
12

2023
5,000

 
—

 
12

Thereafter
2,548

 
—

 
4

 
$
66,184

 
$
10,557

 
$
52,691


a.
Included in these amounts are sand purchase commitments of $47.1 million. Pricing for certain sand purchase agreements is variable and, therefore, the total sand purchase commitments could be as much as $53.7 million. The minimum amount due in the form of shortfall fees under certain sand purchase agreements was $3.6 million as of December 31, 2018.
Schedule Of Letters Of Credit
The letters of credit are categorized below (in thousands):
 
 
December 31,
 
 
2018
 
2017
Insurance programs
 
$
4,105

 
$
2,486

Environmental remediation
 
3,877

 
3,582

Rail car commitments
 
455

 
455

Total letters of credit
 
$
8,437

 
$
6,523