Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Leases [Abstract]
Remaining term of operating leases (in years)	6 years
Total rental expense under operating leases	$ 2,200	$ 2,800	$ 4,600
Minimum future operating lease payments [Abstract]
2016	742
2017	636
2018	486
2019	498
2020 and thereafter	512
Total	$ 2,874