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Revenue Recognition and Accounts Receivable - Schedule of Net Increase to Opening Retained Earnings Due to Cumulative Impact of Adopting (Detail) - USD ($) $ in Thousands | Mar. 31, 2018 | Jan. 01, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Current assets |  |  |
Cash and cash equivalents | $ 77,056 |  | $ 81,157
Accounts receivable, net of allowances of $8,934 and $8,405, respectively | 77,182 |  | 63,437
Inventories | 77,686 |  | 81,330
Prepaid expenses and other current assets | 31,219 |  | 25,877
Total current assets | 263,143 |  | 251,801
Deferred income taxes | 28,359 |  | 23,315
Other long-term assets | 6,814 |  | 21,073
Total assets | 409,004 |  | 405,354
Total liabilities | 95,830 |  | 108,746
Shareholders’ equity |  |  |
Common shares | 1,841 |  | 1,828
Additional paid-in capital | 228,356 |  | 220,591
Retained earnings | 78,493 |  | 70,402
Accumulated other comprehensive income | 4,484 |  | 3,787
Total shareholders’ equity | 313,174 |  | 296,608
Total liabilities and shareholders’ equity | $ 409,004 |  | 405,354
Effect before Topic 606 [Member] |  |  |
Current assets |  |  |
Cash and cash equivalents |  |  | 81,157
Accounts receivable, net of allowances of $8,934 and $8,405, respectively |  |  | 63,437
Inventories |  |  | 81,330
Prepaid expenses and other current assets |  |  | 25,877
Total current assets |  |  | 251,801
Deferred income taxes |  |  | 23,315
Other long-term assets |  |  | 130,238
Total assets |  |  | 405,354
Total liabilities |  |  | 108,746
Shareholders’ equity |  |  |
Common shares |  |  | 1,828
Additional paid-in capital |  |  | 220,591
Retained earnings |  |  | 70,402
Accumulated other comprehensive income |  |  | 3,787
Total shareholders’ equity |  |  | 296,608
Total liabilities and shareholders’ equity |  |  | 405,354
Topic 606 [Member] |  |  |
Current assets |  |  |
Cash and cash equivalents |  | $ 81,157 |
Accounts receivable, net of allowances of $8,934 and $8,405, respectively |  | 72,085 |
Inventories |  | 78,992 |
Prepaid expenses and other current assets |  | 25,877 |
Total current assets |  | 258,111 |
Deferred income taxes |  | 21,766 |
Other long-term assets |  | 130,238 |
Total assets |  | 410,115 |
Total liabilities |  | 108,746 |
Shareholders’ equity |  |  |
Common shares |  | 1,828 |
Additional paid-in capital |  | 220,591 |
Retained earnings |  | 75,163 |
Accumulated other comprehensive income |  | 3,787 |
Total shareholders’ equity |  | 301,369 |
Total liabilities and shareholders’ equity |  | $ 410,115 |
Topic 606 [Member] | Impact of Adoption of ASC 606 |  |  |
Current assets |  |  |
Accounts receivable, net of allowances of $8,934 and $8,405, respectively |  |  | 8,648
Inventories |  |  | (2,338)
Total current assets |  |  | 6,310
Deferred income taxes |  |  | (1,549)
Total assets |  |  | 4,761
Shareholders’ equity |  |  |
Retained earnings |  |  | 4,761
Total shareholders’ equity |  |  | 4,761
Total liabilities and shareholders’ equity |  |  | $ 4,761

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- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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