Business Combination - Norman Hay - Estimated Fair Values of Norman Hay Net Assets Acquired (Details) $ in Thousands, £ in Millions	Oct. 01, 2019 GBP (£)	Oct. 01, 2019 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Business Acquisition [Line Items]
Goodwill			$ 631,212	$ 607,205	$ 83,333
Norman Hay [Member]
Business Acquisition [Line Items]
Cash and cash equivalents		$ 18,981
Accounts receivable, net		15,471
Inventories, net		8,164
Prepaid expenses and other assets		4,341
Propery, plant & equipment		14,981
Right of use lease assets		10,608
Intangible assets		51,088
Goodwill		29,302
Total Assets Purchased		152,936
Long-term debt included current portions		485
Accounts payable, accrued expenses and other accrued liabilities		12,756
Deferred tax liabilities		13,651
Long-term lease liabilities		8,594
Total Liabilities Assumed		35,486
Total fair value of consideration transferred	£ 80.0	117,450
Estimated purchase price settlement		0
Less: cash Acquired		18,981
Net cash paid		98,469
Norman Hay [Member] | As initially Reported [Member]
Business Acquisition [Line Items]
Cash and cash equivalents		18,981
Accounts receivable, net		15,471
Inventories, net		8,213
Prepaid expenses and other assets		4,203
Propery, plant & equipment		14,981
Right of use lease assets		10,608
Intangible assets		51,088
Goodwill		29,384
Total Assets Purchased		152,929
Long-term debt included current portions		485
Accounts payable, accrued expenses and other accrued liabilities		13,488
Deferred tax liabilities		12,746
Long-term lease liabilities		8,594
Total Liabilities Assumed		35,313
Total fair value of consideration transferred		117,616
Estimated purchase price settlement		3,287
Less: cash Acquired		18,981
Net cash paid		95,348
Norman Hay [Member] | Measurement period adjustments [Member]
Business Acquisition [Line Items]
Cash and cash equivalents		0
Accounts receivable, net		0
Inventories, net		(49)
Prepaid expenses and other assets		138
Propery, plant & equipment		0
Right of use lease assets		0
Intangible assets		0
Goodwill		(82)
Total Assets Purchased		7
Long-term debt included current portions		0
Accounts payable, accrued expenses and other accrued liabilities		(732)
Deferred tax liabilities		905
Long-term lease liabilities		0
Total Liabilities Assumed		173
Total fair value of consideration transferred		(166)
Estimated purchase price settlement		(3,287)
Less: cash Acquired		0
Net cash paid		$ 3,121