Annual report pursuant to Section 13 and 15(d)

Income Taxes - Significant Components of The Deferred Tax Assets and Liabilities (Details)

v3.8.0.1
Income Taxes - Significant Components of The Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Deferred tax assets    
Accruals and prepaids $ 14,390 $ 18,010
Deferred revenue 32,502 23,559
Net operating loss carryforwards 186,863 218,719
Stock-based compensation 4,994 6,908
Investment tax and other credits 24,580 18,454
Total deferred tax assets 263,329 285,650
Less: Valuation allowance (5,386) (663)
Gross deferred tax assets 257,943 284,987
Deferred tax liabilities    
Capitalized initial direct costs 38,752 45,030
Fixed asset depreciation 173,175 206,754
Deferred tax on investment in partnerships 105,147 448,600
Gross deferred tax liabilities 317,074 700,384
Net deferred tax liabilities $ (59,131) $ (415,397)