Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Minimum annual rental commitments

Minimum annual rental commitments under noncancellable operating leases consisted of the following at December 31, 2017 (in thousands):

2018	$	1,453
2019		1,144
2020		987
2021		865
2022		710
Thereafter		3,006
	$	8,165