Long-Lived Assets (Tables)

6 Months Ended

Jun. 30, 2015

Long-Lived Assets

Schedule of property, plant and equipment

Property, plant and equipment consisted of the following (dollars in thousands):

	June 30,			December 31,
	2015			2014
Property, plant and equipment	$	887,861		$	843,589
Less accumulated depreciation	(317,194		)	(277,633		)
	$	570,667		$	565,956

Schedule of identifiable intangible assets

The gross carrying amount and accumulated amortization of identifiable intangible assets are as follows (dollars in thousands):

	June 30, 2015						December 31, 2014
	Gross						Gross
	Carrying		Accumulated		Net Carrying		Carrying		Accumulated		Net Carrying
	Value		Amortization		Value		Value		Amortization		Value
Subject to amortization —
Customer relationships	$	21,709	$	13,018	$	8,691	$	21,709	$	11,799	$	9,910
Trade name and other	320		232		88		320		202		118
	22,029		13,250		8,779		22,029		12,001		10,028
Not subject to amortization —
Brand name	27,300		—		27,300		27,300		—		27,300
	27,300		—		27,300		27,300		—		27,300
	$	49,329	$	13,250	$	36,079	$	49,329	$	12,001	$	37,328

Schedule of estimated amortization expense

Estimated amortization expense for the next five years and thereafter is as follows (dollars in thousands):

2015 (remaining months)	$	1,249
2016	2,101
2017	1,703
2018	1,308
2019	1,188
Thereafter	1,230
	$	8,779