Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2012
Buildings and building improvements [Member] | Maximum [Member]
Schedule of useful life of plant and property
Useful life of assets	30 years
Buildings and building improvements [Member] | Minimum [Member]
Schedule of useful life of plant and property
Useful life of assets	15 years
Leasehold Improvements [Member] | Maximum [Member]
Schedule of useful life of plant and property
Useful life of assets	30 years
Leasehold Improvements [Member] | Minimum [Member]
Schedule of useful life of plant and property
Useful life of assets	15 years
Assets under capital leases [Member] | Maximum [Member]
Schedule of useful life of plant and property
Useful life of assets	25 years
Assets under capital leases [Member] | Minimum [Member]
Schedule of useful life of plant and property
Useful life of assets	11 years
Equipment [Member] | Maximum [Member]
Schedule of useful life of plant and property
Useful life of assets	15 years
Equipment [Member] | Minimum [Member]
Schedule of useful life of plant and property
Useful life of assets	5 years