Income Taxes: Income tax disclosure (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

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

Income from continuing operations before taxes for the years ended December 31, 2015, 2014 and 2013 is as follows: 

	2015			2014		2013
United States	$	74,288		$	33,508	$	48,964
Foreign	(4,589		)	6,284		3,750
	$	69,699		$	39,792	$	52,714

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

The provision (benefit) for income taxes for the years ended December 31, 2015, 2014 and 2013 is as follows:

	2015			2014			2013
Current:
Federal	$	18,601		$	13,860		$	14,575
State	745			(1,305		)	2,145
Foreign	1,426			2,100			(70		)
	20,772			14,655			16,650
Deferred:
Federal	$	4,524		$	(2,325	)	$	164
State	(960		)	988			(996		)
Foreign	378			139			(3,522		)
	3,942			(1,198		)	(4,354		)
	$	24,714		$	13,457		$	12,296

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

Reconciliations of the provision for income taxes at the statutory rate to our effective tax rate for the years ended December 31, 2015, 2014 and 2013 are as follows:

	2015					2014					2013
	Amount			Percent		Amount			Percent		Amount			Percent
Federal tax at the expected statutory rate	$	24,395		35.0	%	$	13,927		35.0	%	$	18,450		35.0	%
State income tax, net of federal effect	2,661			3.9	%	981			2.5	%	1,126			2.1	%
Tax credits	(5,861		)	(8.4	)%	(1,591		)	(4.0	)%	(1,974		)	(3.7	)%
Tax-exempt interest and dividends	—			—	%	(3		)	—	%	—			—	%
Domestic production activities/other	107			0.1	%	104			0.2	%	(403		)	(0.8	)%
Foreign income tax	3,412			4.9	%	39			0.1	%	(4,903		)	(9.3	)%
	$	24,714		35.5	%	$	13,457		33.8	%	$	12,296		23.3	%

Deferred tax provision table text block [Table Text Block]

The components of our deferred income tax provision for the years ended December 31, 2015, 2014 and 2013 are as follows: 

	2015			2014			2013
Allowance for doubtful accounts	$	—		$	4		$	4
Inventory reserves	284			(488		)	341
Accruals	(2,977		)	(1,326		)	(470		)
State income taxes	502			(4		)	552
Acquired future tax deductions	3,139			96			40
Depreciation and amortization	1,080			(780		)	(3,850		)
Net operating loss	195			62			—
Tax credits	(635		)	1,238			(971		)
Valuation allowance	2,354			—			—
	$	3,942		$	(1,198	)	$	(4,354	)

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

The components of our deferred income tax assets (liabilities) at December 31, 2015 and 2014 are as follows:

	2015			2014
Deferred tax asset:
State income taxes	$	(1,647	)	$	(1,862	)
Foreign	3,881			$	1,905
Accruals/other	1,432			2,604
Depreciation and amortization	(11,735		)	(5,594		)
Acquired future tax deductions	5,778			639
Stock-based compensation	8,864			6,778
Foreign currency translation adjustments	5,360			2,680
Tax credits state	5,887			5,102
Inventory reserves	1,633			1,538
Allowance for doubtful accounts	—			151
Valuation allowance	(2,354		)	—
	$	17,099		13,941
Deferred tax liability:
Foreign	$	1,372		$	1,376
	$	1,372		$	1,376

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 for 2015, 2014 and 2013: 

	2015			2014			2013
Beginning balance	$	4,115		$	5,544		$	4,236
Increases to prior year tax positions	25			217			391
Increases to current year tax positions	345			661			1,353
Decreases to prior year tax positions	(2,399		)	—			—
Decrease related to settlements	(314		)	(2,113		)	—
Decrease related to lapse of statute of limitations	—			(194		)	(436		)
Ending balance	$	1,772		$	4,115		$	5,544