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Derivative Financial Instruments - Notional Amount and Fair Value of Foreign Currency Forward Contract (Detail) In Thousands, unless otherwise specified | Jun. 30, 2014 Financial Institution Counterparties [Member] Other Assets [Member] Non Designated as Hedging Instrument [Member] CAD | Jun. 30, 2014 Financial Institution Counterparties [Member] Other Assets [Member] Non Designated as Hedging Instrument [Member] EUR (€) | Dec. 31, 2013 Financial Institution Counterparties [Member] Other Assets [Member] Non Designated as Hedging Instrument [Member] CAD | Dec. 31, 2013 Financial Institution Counterparties [Member] Other Assets [Member] Non Designated as Hedging Instrument [Member] EUR (€) | Jun. 30, 2014 Financial Institution Counterparties [Member] Other Liabilities [Member] Non Designated as Hedging Instrument [Member] CAD | Jun. 30, 2014 Financial Institution Counterparties [Member] Other Liabilities [Member] Non Designated as Hedging Instrument [Member] EUR (€) | Jun. 30, 2014 Financial Institution Counterparties [Member] Other Liabilities [Member] Non Designated as Hedging Instrument [Member] GBP (£) | Dec. 31, 2013 Financial Institution Counterparties [Member] Other Liabilities [Member] Non Designated as Hedging Instrument [Member] CAD | Dec. 31, 2013 Financial Institution Counterparties [Member] Other Liabilities [Member] Non Designated as Hedging Instrument [Member] EUR (€) | Dec. 31, 2013 Financial Institution Counterparties [Member] Other Liabilities [Member] Non Designated as Hedging Instrument [Member] GBP (£) | Jun. 30, 2014 Customer Counterparties [Member] Other Assets [Member] Non Designated as Hedging Instrument [Member] CAD | Dec. 31, 2013 Customer Counterparties [Member] Other Assets [Member] Non Designated as Hedging Instrument [Member] CAD | Jun. 30, 2014 Customer Counterparties [Member] Other Liabilities [Member] Non Designated as Hedging Instrument [Member] CAD | Dec. 31, 2013 Customer Counterparties [Member] Other Liabilities [Member] Non Designated as Hedging Instrument [Member] CAD | Jun. 30, 2014 Foreign Exchange Forward [Member] Financial Institution Counterparties [Member] USD ($) | Dec. 31, 2013 Foreign Exchange Forward [Member] Financial Institution Counterparties [Member] USD ($) | Jun. 30, 2014 Foreign Exchange Forward [Member] Customer Counterparties [Member] USD ($) | Dec. 31, 2013 Foreign Exchange Forward [Member] Customer Counterparties [Member] USD ($) | Jun. 30, 2014 GBP Foreign Exchange Forward [Member] Financial Institution Counterparties [Member] USD ($) | Dec. 31, 2013 GBP Foreign Exchange Forward [Member] Financial Institution Counterparties [Member] USD ($) | Jun. 30, 2014 Eurodollar Foreign Exchange Forward [Member] [Member] Financial Institution Counterparties [Member] USD ($) | Dec. 31, 2013 Eurodollar Foreign Exchange Forward [Member] [Member] Financial Institution Counterparties [Member] USD ($)
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Derivative Counter Party [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forward Contracts – Assets Notional Amount | 0 | € 0 | 18,886 | € 1,175 |  |  |  |  |  |  | 27,599 | 14,055 |  |  |  |  |  |  |  |  |  |
Forward Contracts – Liability Notional Amount |  |  |  |  | 27,637 | 1,078 | 548 | 14,078 | 494 | 0 |  |  | 0 | 18,859 |  |  |  |  |  |  |  |
Forward Contracts – Assets Estimated Fair Value |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 85 | 475 | 45 |  |  | 0 | 5
Forward Contracts – Liability Estimated Fair Value |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (437) | $ (23) | $ 0 | $ (58) | $ (9) | $ 0 | $ (8) | $ (4)

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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 + Details
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- Definition Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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