Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019		Jan. 01, 2019	Dec. 31, 2018	[2]
Goodwill impairment charge		$ 379,863
Other assets	[1]	104,693		$ 93,796	$ 50,523
Liabilities		43,292
Accounting Standards Update 2016-02 [Member]
Other assets		$ 40,095	[1]	43,300
Liabilities				43,300
Minimum [Member]
Estimated useful lives		3 years
Maximum [Member]
Estimated useful lives		40 years
Reclassification [Member] | Accounting Standards Update 2016-02 [Member]
Other assets	[1]			$ 43,273

[1] Prior to the adoption of ASC 842, operating lease ROU assets and current and long-term operating lease liabilities were not recorded on the Consolidated Balance Sheets.

[2] Balance as previously reported on the Company’s Annual Report on Form 10-K for the year ended December 31, 2018.