Subsequent Event	3 Months Ended
Mar. 31, 2019
Subsequent Events [Abstract]
Subsequent Event	Subsequent EventIn May 2019, the Company acquired certain assets and liabilities of DfR Solutions for approximately $41.0 million. The acquisition of DfR Solutions' electronics reliability technology, combined with the Company's existing comprehensive multiphysics portfolio, will give customers a complete designer-level solution to analyze for electronics failure earlier in the design cycle.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

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