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Changes in Accumulated Other Comprehensive Income (Loss) By Component (Detail) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Jan. 01, 2018 | Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Beginning balance | $ 920,964 | $ 855,872 |  |
Ending balance | 919,088 | 879,817 |  |
Accumulated other comprehensive loss, net | 26,188 |  |  | $ 359
Retained earnings | 279,942 |  |  | 258,076
Unrealized Gains (Losses) |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (249) | (2,681) |  |
Other comprehensive income (loss) before reclassifications | (25,233) | (685) |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance |  |  |  | (1,458)
Amounts reclassified from accumulated other comprehensive income (loss) to net income | 0 | 0 |  |
Net current-period other comprehensive income (loss) | (25,233) | (685) |  |
Ending balance | (26,691) | (3,366) |  |
Foreign Currency Items |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Beginning balance | 88 | 0 |  |
Other comprehensive income (loss) before reclassifications | 0 | 0 |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance |  |  |  | 0
Amounts reclassified from accumulated other comprehensive income (loss) to net income | 0 | 0 |  |
Net current-period other comprehensive income (loss) | 0 | 0 |  |
Ending balance | 0 | 0 |  |
Total Unrealized Gains (Losses) |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (161) | (2,681) |  |
Other comprehensive income (loss) before reclassifications | (25,233) | (685) |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance |  |  |  | (1,458)
Amounts reclassified from accumulated other comprehensive income (loss) to net income | 0 | 0 |  |
Net current-period other comprehensive income (loss) | (25,233) | (685) |  |
Ending balance | (26,691) | (3,366) |  |
Unrealized Gains (Losses) on Cash Flow Hedges |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (198) | (2,211) |  |
Other comprehensive income (loss) before reclassifications | 646 | 201 |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance |  |  |  | (240)
Amounts reclassified from accumulated other comprehensive income (loss) to net income | 97 | 504 |  |
Net current-period other comprehensive income (loss) | 743 | 705 |  |
Ending balance | 503 | (1,506) |  |
Total |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (359) | (4,892) |  |
Other comprehensive income (loss) before reclassifications | (24,587) | (484) |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance |  |  |  | (1,698)
Amounts reclassified from accumulated other comprehensive income (loss) to net income | 97 | 504 |  |
Net current-period other comprehensive income (loss) | (24,490) | 20 |  |
Ending balance | (26,188) | $ (4,872) |  |
Staff Accounting Bulletin No. 118 | Unrealized Gains (Losses) |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect of new accounting principle in period of adoption |  |  |  | (256)
Staff Accounting Bulletin No. 118 | Foreign Currency Items |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect of new accounting principle in period of adoption |  |  |  | 0
Staff Accounting Bulletin No. 118 | Total Unrealized Gains (Losses) |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect of new accounting principle in period of adoption |  |  |  | (256)
Staff Accounting Bulletin No. 118 | Unrealized Gains (Losses) on Cash Flow Hedges |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect of new accounting principle in period of adoption |  |  |  | (42)
Staff Accounting Bulletin No. 118 | Total |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect of new accounting principle in period of adoption |  |  |  | (298)
Accounting Standards Update 2016-01 |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect of new accounting principle in period of adoption |  |  |  | 0
Accumulated other comprehensive loss, net |  |  | $ 1,300 |
Retained earnings |  |  | $ 1,300 |
Accounting Standards Update 2016-01 | Unrealized Gains (Losses) |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect of new accounting principle in period of adoption |  |  |  | (953)
Accounting Standards Update 2016-01 | Foreign Currency Items |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect of new accounting principle in period of adoption |  |  |  | (88)
Accounting Standards Update 2016-01 | Total Unrealized Gains (Losses) |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect of new accounting principle in period of adoption |  |  |  | (1,041)
Accounting Standards Update 2016-01 | Unrealized Gains (Losses) on Cash Flow Hedges |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect of new accounting principle in period of adoption |  |  |  | 0
Accounting Standards Update 2016-01 | Total |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect of new accounting principle in period of adoption | $ (1,041) |  |  | $ (1,041)

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