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Nature of Business and Summary of Significant Accounting Policies - Summary of Effect of Adoption of ASU 2014-09 and Related ASUs (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 01, 2018
Sales |  |  |  |  |  |  |  |  |  |  |  |
Sales | $ 140,088 | $ 140,335 | $ 128,048 | $ 120,806 | $ 126,836 | $ 185,112 | $ 184,673 | $ 170,279 | $ 529,277 | $ 666,900 | $ 636,781 |
Cost of Sales |  |  |  |  |  |  |  |  |  |  |  |
Cost of Sales |  |  |  |  |  |  |  |  | 325,712 | 363,265 | 345,451 |
Loss before benefit for income taxes |  |  |  |  |  |  |  |  | (33,371) | 44,687 | 46,895 |
(Provision) benefit for income taxes |  |  |  |  |  |  |  |  | 14,029 | (20,847) | (11,666) |
Net income (loss) | (8,447) | $ 7,589 | $ (7,670) | $ (10,814) | (11,110) | $ 15,898 | $ 12,401 | $ 6,651 | (19,342) | 23,840 | 35,229 |
ASSETS |  |  |  |  |  |  |  |  |  |  |  |
Other receivables | 36,699 |  |  |  | 26,578 |  |  |  | 36,699 | 26,578 |  |
Prepaid expenses and other current assets | 10,744 |  |  |  | 17,282 |  |  |  | 10,744 | 17,282 |  |
Inventory | 99,848 |  |  |  | 122,542 |  |  |  | 99,848 | 122,542 |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |
Income tax payable, net | 12,518 |  |  |  | 3,936 |  |  |  | 12,518 | 3,936 |  |
Equity |  |  |  |  |  |  |  |  |  |  |  |
Retained earnings | 883,975 |  |  |  | $ 922,178 |  |  |  | 883,975 | 922,178 |  |
ASU 2014-09 [member] |  |  |  |  |  |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |  |  |  |  |  |
Other receivables |  |  |  |  |  |  |  |  |  |  |  | $ 26,952
Equity |  |  |  |  |  |  |  |  |  |  |  |
Retained earnings |  |  |  |  |  |  |  |  |  |  |  | 922,456
ASU 2014-09 [member] | Balances Without Adoption of ASC 606 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Cost of Sales |  |  |  |  |  |  |  |  |  |  |  |
Loss before benefit for income taxes |  |  |  |  |  |  |  |  | (35,117) |  |  |
(Provision) benefit for income taxes |  |  |  |  |  |  |  |  | 14,763 |  |  |
Net income (loss) |  |  |  |  |  |  |  |  | (20,354) |  |  |
ASSETS |  |  |  |  |  |  |  |  |  |  |  |
Other receivables | 32,933 |  |  |  |  |  |  |  | 32,933 |  |  |
Prepaid expenses and other current assets | 12,739 |  |  |  |  |  |  |  | 12,739 |  |  |
Inventory | 99,873 |  |  |  |  |  |  |  | 99,873 |  |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |
Income tax payable, net | 13,252 |  |  |  |  |  |  |  | 13,252 |  |  |
Equity |  |  |  |  |  |  |  |  |  |  |  |
Retained earnings | 882,963 |  |  |  |  |  |  |  | 882,963 |  |  |
ASU 2014-09 [member] | Adjustments Due to ASU 2014-09 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Cost of Sales |  |  |  |  |  |  |  |  |  |  |  |
Loss before benefit for income taxes |  |  |  |  |  |  |  |  | 1,746 |  |  |
(Provision) benefit for income taxes |  |  |  |  |  |  |  |  | (734) |  |  |
Net income (loss) |  |  |  |  |  |  |  |  | 1,012 |  |  |
ASSETS |  |  |  |  |  |  |  |  |  |  |  |
Other receivables | 3,766 |  |  |  |  |  |  |  | 3,766 |  |  | 374
Prepaid expenses and other current assets | (1,995) |  |  |  |  |  |  |  | (1,995) |  |  |
Inventory | (25) |  |  |  |  |  |  |  | (25) |  |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |
Income tax payable, net | (734) |  |  |  |  |  |  |  | (734) |  |  |
Equity |  |  |  |  |  |  |  |  |  |  |  |
Retained earnings | $ 1,012 |  |  |  |  |  |  |  | 1,012 |  |  | $ 278
Product [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  | 458,232 | 540,396 | 525,502 |
Cost of Sales |  |  |  |  |  |  |  |  |  |  |  |
Cost of Sales |  |  |  |  |  |  |  |  | 278,929 | 279,563 | 270,705 |
Product [Member] | ASU 2014-09 [member] | Balances Without Adoption of ASC 606 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  | 458,182 |  |  |
Cost of Sales |  |  |  |  |  |  |  |  |  |  |  |
Cost of Sales |  |  |  |  |  |  |  |  | 278,904 |  |  |
Product [Member] | ASU 2014-09 [member] | Adjustments Due to ASU 2014-09 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  | 50 |  |  |
Cost of Sales |  |  |  |  |  |  |  |  |  |  |  |
Cost of Sales |  |  |  |  |  |  |  |  | 25 |  |  |
Service [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  | 71,045 | 126,504 | 111,279 |
Cost of Sales |  |  |  |  |  |  |  |  |  |  |  |
Cost of Sales |  |  |  |  |  |  |  |  | 46,783 | $ 83,702 | $ 74,746 |
Service [Member] | ASU 2014-09 [member] | Balances Without Adoption of ASC 606 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  | 67,329 |  |  |
Cost of Sales |  |  |  |  |  |  |  |  |  |  |  |
Cost of Sales |  |  |  |  |  |  |  |  | 44,788 |  |  |
Service [Member] | ASU 2014-09 [member] | Adjustments Due to ASU 2014-09 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  | 3,716 |  |  |
Cost of Sales |  |  |  |  |  |  |  |  |  |  |  |
Cost of Sales |  |  |  |  |  |  |  |  | $ 1,995 |  |  |

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