Other Intangible, Net and Goodwill (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	Amortization period (years)	Gross Amount		Accumulated Amortization		Net intangible assets
		(in thousands)
Customer relationships	20	$	13,600	$	2,158	$	11,442
Tradename	0.5-6	8,100		6,712		1,388
Covenants not to compete	1-10	4,200		1,934		2,266
		$	25,900	$	10,804	$	15,096

Changes in carrying amount of goodwill were as follows:

	(in thousands)
Balance at December 31, 2017	$	132,410
Acquisition	—
Balance at September 30, 2018	$	132,410

Goodwill [Line Items]

Schedule of Goodwill [Table Text Block]

	(in thousands)
Balance at December 31, 2017	$	132,410
Acquisition	—
Balance at September 30, 2018	$	132,410