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Employee Benefits Plans (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2013
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Employee Benefits Plans [Abstract] |
Deferred retirement benefits liability | $ 4,170

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

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- Definition The total amount of the entity's obligation as of the balance sheet date under any other retirement plan(s), such as one or more defined contribution plans. + References No definition available. + Details
Name: | us-gaap_OtherPostretirementBenefitsPayableCurrentAndNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant