v2.4.0.6

STOCK-BASED COMPENSATION (Details 5) (USD $) | 12 Months Ended
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Dec. 31, 2012
Shares |
Nonvested at the beginning of the period (in shares) | 798,710
Granted (in shares) | 409,351
Vested (in shares) | (487,515)
Forfeited and expired (in shares) | (24,455)
Nonvested at the end of the period (in shares) | 696,091
Weighted Average Grant Date Fair Value |
Nonvested at the beginning of the period (in dollars per share) | $ 16.81
Granted (in dollars per share) | $ 30.18
Vested (in dollars per share) | $ 11.76
Forfeited and expired (in dollars per share) | $ 25.86
Nonvested at the end of the period (in dollars per share) | $ 27.90

X
- Definition The number of equity-based payment instruments that were forfeited and expired during the reporting period. + References No definition available. + Details
Name: | axll_ShareBasedCompensationArrangementByShareBasedPaymentAwardForfeitedAndExpiredInPeriod
Namespace Prefix: | axll_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average fair value as of the grant date of equity-based award plans that were forfeited and expired during the reporting period. + References No definition available. + Details
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Namespace Prefix: | axll_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of grants made during the period on equity-based payment instruments. + References No definition available. + Details
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Namespace Prefix: | axll_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period. + References No definition available. + Details
Name: | axll_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | axll_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of non-vested equity-based payment instruments that validly exist and are outstanding as of the balance sheet date. + References No definition available. + Details
Name: | axll_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedNumber
Namespace Prefix: | axll_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average grant date fair value of nonvested equity-based awards that are outstanding as of the balance sheet date. + References No definition available. + Details
Name: | axll_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedWeightedAverageGrantDateFairValue
Namespace Prefix: | axll_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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- Details
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Data Type: | xbrli:stringItemType
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X
- Definition The number of equity-based payment instruments that vested during the reporting period. + References No definition available. + Details
Name: | axll_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestedInPeriod
Namespace Prefix: | axll_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average fair value at grant date pertaining to an award for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments or cash in accordance with terms of the arrangement. + References No definition available. + Details
Name: | axll_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestedInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | axll_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration