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Commitments and Contingencies (Detail Textuals)	Jul. 05, 2014 Agreement
Commitments and Contingencies [Abstract]
Percentages of employees represented by various labour unions	34.00%
Number of collective bargaining agreements	38
Number of collective bargaining agreements up for renewal	6
Number of agreements renegotiated	1

X

- Definition

Represents number of agreements renegotiated.

+ References

No definition available.

+ Details

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X

- Definition

Represents number of collective bargaining agreements.

+ References

No definition available.

+ Details

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Namespace Prefix:	bxc_
Data Type:	xbrli:integerItemType
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X

- Definition

Represents number of collective bargaining agreements up for renewal.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
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X

- Definition

Percentage of employees represented by various labor unions.

+ References

No definition available.

+ Details

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Namespace Prefix:	bxc_
Data Type:	num:percentItemType
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Period Type:	instant

X

- Details

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