Intangible Assets (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	$ 45,736	$ 42,374
Amortization expense associated with finite lived intangible assets	7,000	$ 7,000	$ 8,000
Minimum
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2016	4,000
2017	4,000
2018	4,000
2019	4,000
2020	4,000
Maximum
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2016	6,000
2017	6,000
2018	6,000
2019	6,000
2020	$ 6,000
Customer relationship intangibles | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives	7 years
Customer relationship intangibles | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives	19 years
CRSAL [Member]
Finite-Lived Intangible Assets [Line Items]
Assets Held-for-sale, Long Lived, Fair Value Disclosure	$ 7,000
Finite-Lived Intangible Assets, Accumulated Amortization	$ 3,000