Derivative Financial Instruments (Narrative) (Details) - Subsequent event $ in Millions	Feb. 18, 2020 USD ($)
Interest Rate Contract, Fixed Five Year [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 100
Derivative, Fixed Interest Rate	1.39%
Interest Rate Contract, Fixed Ten Year [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 300
Derivative, Fixed Interest Rate	1.57%

Nominal or face amount used to calculate payment on derivative.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant