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Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning Balance |  |  | $ 509,457 | $ 563,352
Other comprehensive income (loss) | $ 591 | $ (152) | 850 | (419)
Ending Balance | 466,106 | 558,973 | 466,106 | 558,973
Unrealized Gains and (Losses) on Securities Available-for-Sale [Member] |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning Balance |  |  | (465) | (107)
Other comprehensive income (loss), before reclassifications |  |  | 281 | (99)
Amounts reclassified from accumulated other comprehensive income |  |  | 0 | 0
Other comprehensive income (loss) |  |  | 281 | (99)
Ending Balance | (184) | (206) | (184) | (206)
Other comprehensive income (loss), before reclassifications, tax |  |  | (171) | 61
Foreign Currency Translation Adjustments [Member] |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning Balance |  |  | (569) | (135)
Other comprehensive income (loss), before reclassifications |  |  | 569 | (320)
Amounts reclassified from accumulated other comprehensive income |  |  | 0 | 0
Other comprehensive income (loss) |  |  | 569 | (320)
Ending Balance | $ 0 | $ (455) | 0 | (455)
Other comprehensive income (loss), before reclassifications, tax |  |  | $ (348) | $ 195

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- Definition Amount after tax, before reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=66004921&loc=d3e1436-108581 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 + Details
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- Definition Amount of tax expense (benefit) allocated to other comprehensive income (loss) before reclassification adjustment from accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 11 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65896914&loc=d3e39076-109324 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e640-108580 + Details
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