Grants and other liabilities (Tables)

9 Months Ended

Sep. 30, 2018

Grants and other liabilities [Abstract]

Grants and other non-current liabilities

Grants and other liabilities as of September 30, 2018 and December 31, 2017 are as follows:

	Balance as of September 30,		Balance as of December 31,
	2018		2017
	($ in thousands)
Grants		1,167,773		1,225,877
Other Liabilities		485,678		410,183
Grant and other non-current liabilities		1,653,451		1,636,060