Operating Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Payments [Abstract]
2017	$ 2,010
2018	1,501
2019	943
2020	725
2021	610
Thereafter	3,089
Total	8,878
Receipts [Abstract]
2017	561
2018	350
2019	261
2020	227
2021	147
Thereafter	81
Total	1,627
Rental expense net of rental income under operating leases	$ 1,300	$ 1,300	$ 1,300