Income Taxes Income tax disclosure (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

Income from continuing operations before taxes consisted of the following (in thousands): 

	Year Ended December 31,
	2017			2016		2015
United States	$	59,872		$	80,714	$	74,288
Foreign	(8,589		)	4,450		(4,589		)
	$	51,283		$	85,164	$	69,699

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

The (benefit) provision for income taxes consisted of the following (in thousands):

	Year Ended December 31,
	2017			2016			2015
Current:
Federal	$	2,774		$	21,123		$	18,601
State	2,263			2,347			745
Foreign	3,170			1,118			1,426
	8,207			24,588			20,772
Deferred:
Federal	$	(20,878	)	$	(2,045	)	$	4,524
State	(4,619		)	(767		)	(960		)
Foreign	(71		)	304			378
	(25,568		)	(2,508		)	3,942
	$	(17,361	)	$	22,080		$	24,714

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

A reconciliation of the provision for income taxes at the statutory rate to our effective tax rate is as follows (dollars in thousands):

	Year Ended December 31,
	2017					2016					2015
	Amount			Percent		Amount			Percent		Amount			Percent
Federal tax at the expected statutory rate	$	17,950		35.0	%	$	29,807		35.0	%	$	24,395		35.0	%
State income tax, net of federal effect	(403		)	(0.8	)%	1,795			2.1	%	2,661			3.9	%
Tax credits	(2,783		)	(5.4	)%	(1,014		)	(1.2	)%	(5,861		)	(8.4	)%
Foreign income tax differential	3,481			6.8	%	(135		)	(0.1	)%	3,412			4.9	%
Stock based compensation	(18,958		)	(37.0	)%	(7,720		)	(9.1	)%	—			—	%
Impact of the Tax Act	3,076			6.0	%	—			—	%	—			—	%
IP installment sale	3,367			6.6	%	—			—	%	—			—	%
Bargain purchase gain	(24,811		)	(48.4	)%	—			—	%	—			—	%
Other	1,720			3.4	%	(653		)	(0.8	)%	107			0.1	%
	$	(17,361	)	(33.8	)%	$	22,080		25.9	%	$	24,714		35.5	%

Deferred tax provision table text block [Table Text Block]

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

The components of our deferred income tax assets (liabilities) are as follows (in thousands):

	December 31,
	2017			2016
Deferred tax asset:
Foreign	$	—		$	1,223
Accruals/other	8,368			857
Acquired future tax deductions	10,580			6,473
Stock-based compensation	8,633			11,089
Foreign currency translation adjustments	3,425			5,175
Tax credits state	8,471			6,764
Foreign tax credits	2,749			—
Inventory reserves	10,658			1,938
Allowance for doubtful accounts	636			151
Valuation allowance	(7,385		)	—
	$	46,135		$	33,670
Deferred tax liability:
State income taxes	$	1,640		$	1,708
Foreign	202			1,370
Depreciation and amortization	21,005			10,027
	$	22,847		$	13,105
Deferred tax asset, net	$	23,288		$	20,565

Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table Text Block]

The following table summarizes our cumulative gross unrecognized tax benefits (in thousands): 

	Year Ended December 31,
	2017			2016			2015
Beginning balance	$	2,000		$	1,772		$	4,115
Increases to prior year tax positions	77			77			25
Increases due to acquisitions	640			—			—
Increases to current year tax positions	3,992			345			345
Decreases to prior year tax positions	(12		)	(46		)	(2,399		)
Decrease related to settlements	—			—			(314		)
Decrease related to lapse of statute of limitations	(170		)	(148		)	—
Ending balance	$	6,527		$	2,000		$	1,772