Income Taxes (Tables)

6 Months Ended

Jun. 30, 2017

Income Tax Uncertainties [Abstract]

Unrecognized Tax Benefits Related To Uncertain Tax Positions [Table Text Block]

The net interest and penalties expense recognized were as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
	(in thousands)
Net interest and penalties expense	$	207	$	233	$	413	$	332

Accrued interest and penalties recognized were as follows:

	June 30, 2017		December 31, 2016
	(in thousands)
Accrued interest	$	3,435	$	2,473
Accrued penalties	2,509		2,329

Unrecognized tax benefits related to uncertain tax positions and the amount of unrecognized tax benefits that, if recognized, would affect our effective tax rate were as follows:

	June 30, 2017		December 31, 2016
	(in thousands)
Unrecognized tax benefits related to uncertain tax positions	$	64,396	$	57,626
The amount of unrecognized tax benefits that, if recognized, would affect our effective tax rate	63,067		56,411