Commitments and Contingencies (Details Textual) (USD $) In Millions, unless otherwise specified	0 Months Ended	12 Months Ended
	Mar. 22, 2013 sqft	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies Disclosure [Abstract]
Number of years of lease of corporate headquarters	6 years
Area of leased office building	192,000
Purchase price of property at end of Lease Term	$ 41.2
Percentage of Lease Balance as final payment end of lease term	86.00%
Expense for known and future asbestos-related litigation		$ 6.7	$ 0	$ 0