Leases and Other - Additional Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014
Leases and Other (Textual) [Abstract]
Lease expiration period	40 years
Aggregate purchase obligation	$ 28.2us-gaap_PurchaseObligation

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.