Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Significant Accounting Policies [Abstract]

Schedule of useful life of plant and property

Depreciation and amortization is computed on a straight-line basis as follows:

Buildings and building improvements	15-30 years
Leasehold improvements	15-30 years	*
Assets under capital leases	11-25 years	*
Equipment	5-15 years

* Based on the lesser of the useful life of the asset or the term of the applicable lease.