Valuation And Qualifying Accounts (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance For Loss On Accounts Receivable
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period		$ 52,855	$ 41,025	$ 23,959
Additions, Charged to costs and expenses		52,460	41,803	44,640
Deductions or payments		(42,419)	(29,973)	(27,574)
Balance at end of period		62,896	52,855	41,025
Allowance For Deferred Taxes
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	[1]	50,969	49,743	48,977
Additions, Other	[1]		1,226	379
Additions, Acquisitions	[1]	10,063		872
Deductions or payments	[1]	(14,356)		(485)
Balance at end of period	[1]	$ 46,676	$ 50,969	$ 49,743

[1] The Company identified deferred income tax assets for state income tax NOLs of $60.0 million, $68.8 million and $56.7 million at December 31, 2015, December 31, 2014 and December 31, 2013, respectively, and a corresponding deferred income tax valuation allowance of $46.7 million, $50.9 million and $49.5 million at December 31, 2015, December 31, 2014 and December 31, 2013, respectively, after determining that a portion of these state net deferred income tax assets were not realizable. The Company identified deferred income tax assets for federal income tax NOLs of $119.1 million, $51.4 million and $25.5 million at December 31, 2015, December 31, 2014 and December 31, 2013, respectively, with no corresponding deferred income tax valuation allowance at December 31, 2015 or December 31, 2014 and a corresponding deferred income tax valuation allowance of $0.2 million at December 31, 2013 after determining that a portion of these federal net deferred income tax assets were not realizable.