| Schedule of Accounts Receivable, Net |
| | | | | | | | | | As of December 31, | | 2015 | | 2014 | Accounts receivable, trade | $ | 154,497 |
| | $ | 280,657 |
| Less allowance for doubtful accounts | (4,139 | ) | | (3,976 | ) | Net accounts receivable, trade | 150,358 |
| | 276,681 |
| Accounts receivable, other | 10,490 |
| | 12,743 |
| Accounts receivable, net | $ | 160,848 |
| | $ | 289,424 |
|
|
| Reconciliation of Beginning and Ending Amount of Allowance for Doubtful Accounts |
A reconciliation of the beginning and ending amount of allowance for doubtful accounts follows: | | | | | | | | | | | | | | | | | | | | | | Balance at Beginning of Period | | Charged to Expense | | Charged (to) from Another Account | | Deductions | | Balance at End of Period | Balance, December 31, 2015: | | | | | | | | | | Allowance for doubtful accounts | $ | 3,976 |
| | $ | 1,589 |
| | $ | 7 |
| | $ | 1,433 |
| | $ | 4,139 |
| Allowance for notes receivable | 2,367 |
| | — |
| | (7 | ) | | 959 |
| | 1,401 |
| Total | $ | 6,343 |
| | $ | 1,589 |
| | $ | — |
| | $ | 2,392 |
| | $ | 5,540 |
| Balance, December 31, 2014: | | | | | | | | | | Allowance for doubtful accounts | $ | 1,607 |
| | $ | 2,350 |
| | $ | 84 |
| | $ | 65 |
| | $ | 3,976 |
| Allowance for notes receivable | 3,515 |
| | — |
| | (84 | ) | | 1,064 |
| | 2,367 |
| Total | $ | 5,122 |
| | $ | 2,350 |
| | $ | — |
| | $ | 1,129 |
| | $ | 6,343 |
| Balance, December 31, 2013: | | | | | | | | | | Allowance for doubtful accounts | $ | 2,556 |
| | $ | 559 |
| | $ | (740 | ) | | $ | 768 |
| | $ | 1,607 |
| Allowance for notes receivable | 2,847 |
| | 328 |
| | 740 |
| | 400 |
| | 3,515 |
| Total | $ | 5,403 |
| | $ | 887 |
| | $ | — |
| | $ | 1,168 |
| | $ | 5,122 |
|
|