Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Assets and liabilities that are measured at fair value on a recurring basis consisted of the following, as of the dates indicated below:

	Fair value measurement using
(dollars in thousands)	Level 1		Level 2		Level 3		Total
Fair value as of December 31, 2018
Financial assets:
Derivative instruments	$	—	$	2,260	$	—	$	2,260
Total financial assets	$	—	$	2,260	$	—	$	2,260
Fair value as of December 31, 2018
Financial liabilities:
Derivative instruments	$	—	$	186	$	—	$	186
Total financial liabilities	$	—	$	186	$	—	$	186
Fair value as of December 31, 2017
Financial assets:
Derivative instruments	$	—	$	1,283	$	—	$	1,283
Total financial assets	$	—	$	1,283	$	—	$	1,283