XML 167 R152.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Pension Benefits - Changes in Benefit Obligation and Fair Value of Benefit Plans Assets (Footnote) (Detail) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($)
Compensation and Retirement Disclosure [Abstract] |
Amortized from accumulated other comprehensive (loss) income into net periodic benefit cost | $ 0.5

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount included in accumulated other comprehensive income (AOCI) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position, including gain (loss), prior service cost (credit), and transition asset (obligation). + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanAmountToBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossNextFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration