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Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Components of Deferred Tax Assets [Abstract]    
Inventory $ 4,649 $ 4,085
Net operating losses 22,197 3,679
Capitalized research and development 5,187 6,201
Deferred compensation 2,240 2,102
Accounts receivable 2,784 2,556
Compensation and benefits 7,540 6,049
Accrued pension 5,348 3,710
Research and development credit 13,540 10,321
Interest limitation 0 5,702
Convertible notes hedge 6,999 9,004
Deferred Tax Assets, Lease Liabilities 4,452 5,688
Other 6,793 4,336
Less: valuation allowances (2,721) (1,732)
Deferred Tax Assets, Net of Valuation Allowance 79,008 61,701
Components of Deferred Tax Liabilities [Abstract]    
Goodwill and intangible assets 104,119 102,015
Depreciation 2,512 301
State taxes 9,614 11,161
Unremitted foreign earnings 2,423 2,619
Convertible notes debt discount 7,060 9,096
Deferred Tax Liabilities, Leasing Arrangements 4,313 5,338
Deferred tax liabilities 130,041 130,530
Net liability $ (51,033) $ (68,829)