Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Amortizable Intangible Assets

The net consolidated balance of intangible assets consisted of the following at December 31, 2017 and 2016:

		As of December 31,
		2017							2016
(Dollars in thousands)	Useful Life (In Years)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Customer relationships	10	$	25,002	$	(17,085	)	$	7,917	$	25,002	$	(14,585	)	$	10,417
Trademarks	6	5,754		(5,754		)	—		5,754		(5,368		)	386
Total amortizable intangible assets	6 - 10	$	30,756	$	(22,839	)	$	7,917	$	30,756	$	(19,953	)	$	10,803

Summary of Estimated Amortization of Intangible Assets for Future Periods

Estimated amortization of intangible assets for future periods was as follows:

For the year ending December 31,	(Dollars in thousands)
2018	$	2,500
2019	2,500
2020	2,500
2021	417
Total	$	7,917