Summary of Significant Accounting Policies and Other Matters - Goodwill (Details)	12 Months Ended
Dec. 31, 2018 USD ($)
Accounting Policies [Abstract]
Goodwill, impairment charge	$ 0

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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-Publisher FASB
-Name Accounting Standards Codification
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Balance Type:	debit
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