Income Taxes	3 Months Ended
Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company accounts for income taxes in accordance with ASC Topic 740, Income Taxes. Income tax expense represented 17% and 22% of pre-tax book income for the three months ended March 31, 2019 and 2018, respectively. The Company's effective income tax rate in both periods reflected the benefit of research and development tax credits ("R&D Credits") and excess tax benefits from stock compensation. The effective income tax rate for the three months ended March 31, 2018 included an unfavorable adjustment to the provisional estimates of the impacts of the Tax Cuts and Jobs Act of 2017 (the "TCJA"), while the rate in the first quarter of 2019 reflected a favorable adjustment to the reserve for uncertain tax positions following completion of a German tax audit.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI http://asc.fasb.org/topic&trid=2144680

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