Quarterly report pursuant to Section 13 or 15(d)

Other Assets (Details)

v3.10.0.1
Other Assets (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]          
Costs to obtain contracts $ 200,758   $ 200,758   $ 157,970
Accumulated amortization of costs to obtain contracts (22,571)   (22,571)   (16,485)
Unbilled receivables 72,290   72,290   51,710
Operating lease right-of-use assets 20,577   20,577   25,465
Other assets 65,651   65,651   27,804
Other assets, total 336,705   336,705   $ 246,464
Amortization cost $ 2,200 $ 1,700 $ 6,200 $ 4,700