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INCOME TAXES (Detail Texuals) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012
Income Tax Disclosure [Abstract] |
Current income tax expense benefit adjustment of federal and other tax | $ 1,361

X
- Definition Component of income tax expense (benefit) attributable to an adjustment of federal domestic activity deductions, as well as federal research and development and other tax credits. + References No definition available. + Details
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Namespace Prefix: | mlr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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