Lease Commitments (Textual) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) ft²	Dec. 31, 2014 USD ($) ft²	Feb. 29, 2016 ft²	Dec. 30, 2014 ft²
Long-term Purchase Commitment [Line Items]
Rent expense, net | $	$ 3.9	$ 4.6	$ 6.0
Area of principal executive office space			58,000		132,000
Sublet to independent third party [Member]
Long-term Purchase Commitment [Line Items]
Area of principal executive office space		0		3,000