Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

	For the three months ended September 30, 2018
	As Reported			Adjustments Due to the						Balances If We Had Not Adopted the New Standards
Statement of Operations and Comprehensive Income				New Revenue Standard			New Investment Standard
	(In thousands)
Revenue:
Services and other revenue - other	$	393,220		$	(99	)	$	—		$	393,121
Total revenue	$	534,855		$	(99	)	$	—		$	534,756
Costs and expenses:
Cost of sales - services and other (exclusive of depreciation and amortization)	$	151,047		$	951		$	—		$	151,998
Selling, general and administrative expenses	$	97,675		$	970		$	—		$	98,645
Total costs and expenses	$	440,535		$	1,921		$	—		$	442,456
Operating income (loss)	$	94,320		$	(2,020	)	$	—		$	92,300
Other income (expense):
Interest expense, net of amounts capitalized	$	(65,090	)	$	156		$	—		$	(64,934	)
Gains and losses on investments, net	$	145		$	—		$	(144	)	$	1
Total other income (expense), net	$	(51,874	)	$	156		$	(144	)	$	(51,862	)
Income (loss) before income taxes	$	42,446		$	(1,864	)	$	(144	)	$	40,438
Income tax benefit (provision)	$	(13,526	)	$	454		$	—		$	(13,072	)
Net income (loss)	$	28,920		$	(1,410	)	$	(144	)	$	27,366
Net income (loss) attributable to HSS	$	28,470		$	(1,410	)	$	(144	)	$	26,916
Comprehensive income
Net income (loss)	$	28,920		$	(1,410	)	$	(144	)	$	27,366
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) on available-for-sale securities and other	$	(117	)	$	—		$	144		$	27
Total other comprehensive income (loss), net of tax	$	(9,578	)	$	—		$	144		$	(9,434	)
Comprehensive income (loss)	$	19,342		$	(1,410	)	$	—		$	17,932
Comprehensive income (loss) attributable to HSS	$	19,482		$	(1,410	)	$	—		$	18,072

	For the nine months ended September 30, 2018
	As Reported			Adjustments Due to the						Balances If We Had Not Adopted the New Standards
Statement of Operations and Comprehensive Income				New Revenue Standard			New Investment Standard
	(In thousands)
Revenue:
Services and other revenue - other	$	1,132,669		$	1,927		$	—		$	1,134,596
Total revenue	$	1,565,346		$	1,927		$	—		$	1,567,273
Costs and expenses:
Cost of sales - services and other (exclusive of depreciation and amortization)	$	448,925		$	3,429		$	—		$	452,354
Selling, general and administrative expenses	$	285,700		$	5,825		$	—		$	291,525
Total costs and expenses	$	1,291,584		$	9,254		$	—		$	1,300,838
Operating income (loss)	$	273,762		$	(7,327	)	$	—		$	266,435
Other income (expense):
Interest expense, net of amounts capitalized	$	(193,625	)	$	374		$	—		$	(193,251	)
Gains and losses on investments, net	$	262		$	—		$	(1,083	)	$	(821	)
Total other income (expense), net	$	(152,043	)	$	374		$	(1,083	)	$	(152,752	)
Income (loss) before income taxes	$	121,719		$	(6,953	)	$	(1,083	)	$	113,683
Income tax benefit (provision)	$	(31,725	)	$	1,780		$	—		$	(29,945	)
Net income (loss)	$	89,994		$	(5,173	)	$	(1,083	)	$	83,738
Net income (loss) attributable to HSS	$	88,702		$	(5,173	)	$	(1,083	)	$	82,446
Comprehensive income
Net income (loss)	$	89,994		$	(5,173	)	$	(1,083	)	$	83,738
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) on available-for-sale securities and other	$	(199	)	$	—		$	255		$	56
Other-than-temporary impairment loss on available-for-sale securities	$	—		$	—		$	828		$	828
Total other comprehensive income (loss), net of tax	$	(40,077	)	$	—		$	1,083		$	(38,994	)
Comprehensive income (loss)	$	49,917		$	(5,173	)	$	—		$	44,744
Comprehensive income (loss) attributable to HSS	$	50,014		$	(5,173	)	$	—		$	44,841

The cumulative effects of changes to the impacted line items on our Condensed Consolidated Balance Sheet as of January 1, 2018 for the adoption of these standards were as follows:

	Balance at December 31, 2017			Adjustments Due to the						Balance at January 1, 2018
				New Revenue Standard			New Investment Standard
	(In thousands)
Assets:
Trade accounts receivable and contract assets, net	$	196,840		$	(7,103	)	$	—		$	189,737
Other current assets	$	91,544		$	533		$	—		$	92,077
Other noncurrent assets, net	$	202,814		$	22,545		$	—		$	225,359
Total assets	$	6,857,350		$	15,975		$	—		$	6,873,325
Liabilities:
Contract liabilities	$	65,959		$	(1,542	)	$	—		$	64,417
Accrued expenses and other	$	77,312		$	255		$	—		$	77,567
Deferred tax liabilities, net	$	439,631		$	3,122		$	—		$	442,753
Other noncurrent liabilities	$	107,627		$	(4,068	)	$	—		$	103,559
Total liabilities	$	4,558,106		$	(2,233	)	$	—		$	4,555,873
Shareholders’ Equity:
Accumulated other comprehensive income (loss)	$	(52,822	)	$	—		$	433		$	(52,389	)
Accumulated earnings (losses)	$	582,683		$	18,208		$	(433	)	$	600,458
Total shareholders’ equity	$	2,299,244		$	18,208		$	—		$	2,317,452
Total liabilities and shareholders’ equity	$	6,857,350		$	15,975		$	—		$	6,873,325

Our adoption of these standards impacted the referenced line items on our Condensed Consolidated Balance Sheet, Statement of Operations and Statements of Comprehensive Income (Loss) as follows:

	As of September 30, 2018
	As Reported			Adjustments Due to the						Balances If We Had Not Adopted the New Standards
Balance Sheet				New Revenue Standard			New Investment Standard
	(In thousands)
Assets:
Trade accounts receivable and contract assets, net	$	217,481		$	8,511		$	—		$	225,992
Other current assets	$	17,199		$	(533	)	$	—		$	16,666
Other noncurrent assets, net	$	252,085		$	(33,310	)	$	—		$	218,775
Total assets	$	6,965,235		$	(25,332	)	$	—		$	6,939,903
Liabilities:
Contract liabilities	$	74,135		$	971		$	—		$	75,106
Accrued expenses and other	$	66,728		$	(255	)	$	—		$	66,473
Deferred tax liabilities, net	$	479,671		$	(4,902	)	$	—		$	474,769
Other noncurrent liabilities	$	104,868		$	2,234		$	—		$	107,102
Total liabilities	$	4,587,091		$	(1,952	)	$	—		$	4,585,139
Shareholders’ Equity:
Accumulated other comprehensive loss	$	(91,077	)	$	—		$	650		$	(90,427	)
Accumulated earnings	$	689,160		$	(23,380	)	$	(650	)	$	665,130
Total shareholders’ equity	$	2,378,144		$	(23,380	)	$	—		$	2,354,764
Total liabilities and shareholders’ equity	$	6,965,235		$	(25,332	)	$	—		$	6,939,903