Derivative Financial Instruments - Derivative and Nonderivative Hedging Instrument Fair Value Disclosure (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Asset Derivatives [Abstract]
Total asset derivatives	$ 4,297,000	$ 6,525,000
Liability Derivatives [Abstract]
Intangible assets, gross (excluding goodwill)	979,814,000	981,160,000
Net Amount	106,000	234,000
Net Amount	4,241,000	6,422,000
Cash Collateral Received	0	0
Gross Amounts of Recognized Assets Presented in the Consolidated Balance Sheets	4,297,000	6,525,000
Gross Amounts of Recognized Liabilities Presented in the Consolidated Balance Sheets	162,000	337,000
Designated as Hedging Instrument [Member] \| Other Current Assets [Member] \| Interest Rate Swap [Member]
Asset Derivatives [Abstract]
Interest rate swap contracts	174,000	1,866,000
Designated as Hedging Instrument [Member] \| Other Current Assets [Member] \| Interest Rate Cap [Member]
Asset Derivatives [Abstract]
Interest rate cap contracts	1,000	535,000
Designated as Hedging Instrument [Member] \| Other Current Assets [Member] \| Currency Swap [Member]
Asset Derivatives [Abstract]
Cross currency swap contract	1,156,000	1,631,000
Designated as Hedging Instrument [Member] \| Other Noncurrent Assets [Member] \| Interest Rate Swap [Member]
Asset Derivatives [Abstract]
Interest rate cap contracts	0	746,000
Designated as Hedging Instrument [Member] \| Other Noncurrent Assets [Member] \| Interest Rate Cap [Member]
Asset Derivatives [Abstract]
Interest rate cap contracts	0	251,000
Designated as Hedging Instrument [Member] \| Other Noncurrent Assets [Member] \| Currency Swap [Member]
Asset Derivatives [Abstract]
Cross currency swap contract	2,870,000	1,339,000
Not Designated as Hedging Instrument [Member] \| Other Current Assets [Member]
Asset Derivatives [Abstract]
Foreign exchange forward contracts	96,000	157,000
Not Designated as Hedging Instrument [Member] \| Other Current Liabilities [Member]
Liability Derivatives [Abstract]
Foreign exchange forward contracts	$ 162,000	$ 337,000

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments.

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