Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Future Minimum Rental Payments on Operating Leases

Future minimum rental payments on such operating leases at December 31, 2017 are as follows:

(Dollar amounts in thousands)	Unrelated parties		Related party		Minimum future rentals to related parties
2018	$	478	$	7,004	$	7,482
2019	139		7,228		7,367
2020	21		2,397		2,418
2021	—		605		605
2022 and thereafter	—		—		—
	$	638	$	17,234	$	17,872