Summary Of Significant Accounting Policies (Cash and Cash Equivalents) (Details) $ in Millions	Dec. 31, 2018 USD ($)
Accounting Policies [Abstract]
Cash in excess of the FDIC insured limit	$ 70.6

The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation.

No definition available.

Name:	us-gaap_CashUninsuredAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant