Property and Equipment (Tables)

9 Months Ended

Sep. 30, 2016

Property, Plant and Equipment [Abstract]

Schedule of Impairment Charges [Table Text Block]

The following table summarizes impairment charges recognized during the three and nine months ended September 30, 2016 and 2015 (amounts in thousands):

	Three months ended September 30,				Nine months ended September 30,
	2016		2015		2016		2015
Assets held for sale	$	3,344	$	2,329	$	3,344	$	9,858
Colombian assets	—		—		—		60,130
Domestic drilling rigs and equipment	918		—		918		9,660
	$	4,262	$	2,329	$	4,262	$	79,648