XML 44 R30.htm IDEA: XBRL DOCUMENT v3.4.0.3

COMMITMENTS AND CONTINGENCIES (Detail Textuals) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Long-term Purchase Commitment [Line Items]
Maximum repurchase collateral amount	$ 39,281	$ 38,334
Capital Addition Purchase Commitments
Long-term Purchase Commitment [Line Items]
Commitment for construction and acquisition of property, plant and equipment	13,549
Pennsylvania
Long-term Purchase Commitment [Line Items]
Estimated cost of operations	23,712
Cost incurred in manufacturing operations	11,972
Tennessee
Long-term Purchase Commitment [Line Items]
Estimated cost of operations	15,233
Cost incurred in manufacturing operations	$ 1,270

X

- Definition

Represents amount of cost incurred in project.

+ References

No definition available.

+ Details

Name:	mlr_CostsIncurredInProject
Namespace Prefix:	mlr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents amount of estimated cost of project.

+ References

No definition available.

+ Details

Name:	mlr_EstimatedCostOfProject
Namespace Prefix:	mlr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The maximum potential amount of collateral that the company could be required to purchase during the period.

+ References

No definition available.

+ Details

Name:	mlr_ThresholdLimitForRepurchasesOfCollateralFromThirdPartyLenders
Namespace Prefix:	mlr_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The minimum amount the entity agreed to spend under the long-term purchase commitment.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermPurchaseCommitmentAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermPurchaseCommitmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=us-gaap_CapitalAdditionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=mlr_PennsylvaniaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=mlr_TennesseeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: