Leases and Other (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012
Leases and Other (Textual) [Abstract]
Lease expiration period	40 years
Aggregate purchase obligation	$ 32.8

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

No definition available.