Intangible assets Schedule of intangible assets (Tables)

12 Months Ended

Dec. 31, 2017

Finite-Lived Intangible Assets [Line Items]

Intangible Assets Disclosure [Text Block]

Intangible assets

The gross carrying amount and accumulated amortization by intangible asset class were as follows:

	(Dollars in thousands)
	December 31, 2017							December 31, 2016
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Value		Gross Carrying Amount		Accumulated Amortization			Net Carrying Value
Trade names	$	8,182	$	(957	)	$	7,225	$	1,000	$	(787	)	$	213
Customer relationships	4,911		(323		)	4,588		716		(85		)	631
	$	13,093	$	(1,280	)	$	11,813	$	1,716	$	(872	)	$	844

Amortization expense of $0.4 million, $0.1 million and $0.1 million related to intangible assets was recorded in General and administrative expenses for 2017, 2016 and 2015, respectively. The estimated aggregate amortization expense for each of the next five years are as follows:

	(Dollars in thousands)
Year	Amortization
2018	$	875
2019	1,111
2020	1,254
2021	1,363
2022	1,154
Thereafter	6,056
	$	11,813

The gross carrying amount and accumulated amortization by intangible asset class were as follows:

	(Dollars in thousands)
	December 31, 2017							December 31, 2016
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Value		Gross Carrying Amount		Accumulated Amortization			Net Carrying Value
Trade names	$	8,182	$	(957	)	$	7,225	$	1,000	$	(787	)	$	213
Customer relationships	4,911		(323		)	4,588		716		(85		)	631
	$	13,093	$	(1,280	)	$	11,813	$	1,716	$	(872	)	$	844