Income Taxes Income tax disclosure (Tables)

12 Months Ended

Dec. 31, 2018

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,
	2018			2017			2016
United States	$	(8,600	)	$	59,872		$	80,714
Foreign	30,974			(8,589		)	4,450
	$	22,374		$	51,283		$	85,164

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,
	2018			2017			2016
Current:
Federal	$	492		$	2,774		$	21,123
State	1,865			2,263			2,347
Foreign	9,136			3,170			1,118
	11,493			8,207			24,588
Deferred:
Federal	$	(9,118	)	$	(20,878	)	$	(2,045	)
State	(3,072		)	(4,619		)	(767		)
Foreign	(5,722		)	(71		)	304
	(17,912		)	(25,568		)	(2,508		)
	$	(6,419	)	$	(17,361	)	$	22,080

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,
	2018					2017					2016
	Amount			Percent		Amount			Percent		Amount			Percent
Federal tax at the expected statutory rate	$	4,699		21.0	%	$	17,950		35.0	%	$	29,807		35.0	%
State income tax, net of federal effect	927			4.1	%	(403		)	(0.8	)%	1,795			2.1	%
Tax credits	(4,961		)	(22.2	)%	(2,783		)	(5.4	)%	(1,014		)	(1.2	)%
Global intangible low-taxed income	2,363			10.6	%	—			—	%	—			—	%
Foreign income tax differential	(2,944		)	(13.2	)%	3,481			6.8	%	(135		)	(0.1	)%
Stock based compensation	(11,040		)	(49.3	)%	(18,958		)	(37.0	)%	(7,720		)	(9.1	)%
Impact of the Tax Act	826			3.7	%	3,076			6.0	%	—			—	%
IP installment sale	3,252			14.5	%	3,367			6.6	%	—			—	%
Bargain purchase gain	—			—	%	(24,811		)	(48.4	)%	—			—	%
Section 162(m)	456			2.0	%	595			1.2	%	1,133			1.3	%
Other	3			0.1	%	1,125			2.2	%	(1,786		)	(2.1	)%
	$	(6,419	)	(28.7	)%	$	(17,361	)	(33.8	)%	$	22,080		25.9	%

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,
	2018			2017
Deferred tax asset:
Accruals/other	11,291			956
Contingent consideration	12,451			7,412
Net operating loss carryforwards	12,686			—
Acquired future tax deductions	10,722			10,580
Stock-based compensation	10,775			8,633
Foreign currency translation adjustments	3,108			3,425
Tax credits	14,470			11,220
Inventory reserves	5,674			10,658
Allowance for doubtful accounts	830			636
Valuation allowance	(5,436		)	(7,385		)
	$	76,571		$	46,135
Deferred tax liability:
State income taxes	$	2,639		$	1,640
Foreign	612			202
Depreciation and amortization	35,387			21,005
	$	38,638		$	22,847
Deferred tax asset, net	$	37,933		$	23,288

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,
	2018			2017			2016
Beginning balance	$	6,527		$	2,000		$	1,772
Increases to prior year tax positions	—			77			77
Increases due to acquisitions	—			640			—
Increases to current year tax positions	4,536			3,992			345
Decreases to prior year tax positions	(146		)	(12		)	(46		)
Decrease related to lapse of statute of limitations	(93		)	(170		)	(148		)
Ending balance	$	10,824		$	6,527		$	2,000