v2.4.1.9

Summary of Major Types of Costs, Cumulative Costs Incurred and Total Cost Expected Associated With Restructuring Activities (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2014
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring costs | $ 14,732us-gaap_RestructuringCharges | $ 0us-gaap_RestructuringCharges | $ 0us-gaap_RestructuringCharges |
Total Expected Plan Costs | 15,000us-gaap_RestructuringAndRelatedCostExpectedCost1 |  |  | 18,400us-gaap_RestructuringAndRelatedCostExpectedCost1
Operating expenses |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring costs | 14,732us-gaap_RestructuringCharges / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember |  |  |
Total Costs Incurred To Date | 14,732us-gaap_RestructuringAndRelatedCostCostIncurredToDate1 / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember |  |  |
Total Expected Plan Costs | 15,013us-gaap_RestructuringAndRelatedCostExpectedCost1 / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember |  |  |
Operating expenses | Severance and related employee benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring costs | 13,162us-gaap_RestructuringCharges / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember |  |  |
Total Costs Incurred To Date | 13,162us-gaap_RestructuringAndRelatedCostCostIncurredToDate1 / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember |  |  |
Total Expected Plan Costs | 13,162us-gaap_RestructuringAndRelatedCostExpectedCost1 / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember |  |  |
Operating expenses | Contract termination costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring costs | 1,159us-gaap_RestructuringCharges / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_ContractTerminationMember |  |  |
Total Costs Incurred To Date | 1,159us-gaap_RestructuringAndRelatedCostCostIncurredToDate1 / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_ContractTerminationMember |  |  |
Total Expected Plan Costs | 1,159us-gaap_RestructuringAndRelatedCostExpectedCost1 / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_ContractTerminationMember |  |  |
Operating expenses | Other costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring costs | 411us-gaap_RestructuringCharges / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_OtherRestructuringMember |  |  |
Total Costs Incurred To Date | 411us-gaap_RestructuringAndRelatedCostCostIncurredToDate1 / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_OtherRestructuringMember |  |  |
Total Expected Plan Costs | $ 692us-gaap_RestructuringAndRelatedCostExpectedCost1 / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_OtherRestructuringMember |  |  |

X
- Definition Amount of costs incurred to date for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
Name: | us-gaap_RestructuringAndRelatedCostCostIncurredToDate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount expected to be recognized in earnings for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
Name: | us-gaap_RestructuringAndRelatedCostExpectedCost1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
Name: | us-gaap_RestructuringCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_RestructuringCostAndReserveLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_OperatingExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |