Intangible Assets and Goodwill (Tables)

12 Months Ended

Dec. 31, 2016

Finite-Lived Intangible Assets [Line Items]

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

	2016
	Amortization period (years)	Gross Amount		Accumulated Amortization		Net intangible assets
		(in thousands)
Customer relationships	20	$	7,600	$	1,187	$	6,413
Tradename	6	7,400		3,854		3,546
Covenants not to compete	10	3,100		969		2,131
		$	18,100	$	6,010	$	12,090

	2015
	Amortization period (years)	Gross Amount		Accumulated Amortization		Net intangible assets
		(in thousands)
Customer relationships	20	$	7,600	$	807	$	6,793
Tradename	6	7,400		2,620		4,780
Covenants not to compete	10	3,100		660		2,440
Real estate options	2.2	942		942		—
		$	19,042	$	5,029	$	14,013