Fair Value of Financial Instruments (Narrative) (Details)	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 GBP (£) contract	Dec. 31, 2019 EUR (€) contract	Dec. 31, 2019 USD ($) contract	Dec. 31, 2018 GBP (£) contract	Dec. 31, 2018 EUR (€) contract	Dec. 31, 2018 USD ($) contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ 700,000
Derivative, notional amount | £				£ 4,800,000
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	700,000
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	200,000
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	381,000	$ (40,000)	$ 0
Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, Number of Instruments Held | contract							12	12	12
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, Number of Instruments Held | contract				26	26	26
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign Currency Contract, Euro [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, notional amount | £				£ 24,200,000			£ 12,900,000
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign Currency Contract, Pound [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, notional amount | £				£ 9,700,000			£ 4,100,000
Not Designated as Hedging Instrument [Member] | Forward contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, Number of Instruments Held | contract				15	15	15	2	2	2
Not Designated as Hedging Instrument [Member] | Euro Member Countries, Euro | Forward contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, notional amount | €					€ 20,000,000.0			€ 16,000,000.0
Not Designated as Hedging Instrument [Member] | United Kingdom, Pounds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, notional amount						$ 5,600,000			$ 6,300,000
Not Designated as Hedging Instrument [Member] | India, Rupees
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, notional amount						$ 756,000,000.0
Convertible Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible Security, Investment In Period	$ 600,000
Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible Security, Investment In Period		$ 2,500,000