Contract assets and contract liabilities (Tables)

12 Months Ended

Dec. 31, 2018

Contract assets and contract liabilities

Schedule of summary of the contract asset, net and contract liability, net activity and amounts of contract liability balance and performance obligations included in revenues

The opening and closing balances of our contract asset, net, contract liability, net, and receivables balances from contracts with customers for the year ended December 31, 2018 are as follows:

	Contract		Contract
	Assets, Net		Liabilities, Net
Balance at January 1, 2018	$	798	$	204,472
Balance at December 31, 2018		468		217,733
Change	$	(330)	$	13,261

Revenues for the year ended December 31, 2018 include the following:

	Year
	Ended
	December 31,
	2018
Amounts included in the beginning of period contract liability balance	$	85,592
Amounts associated with performance obligations satisfied in previous periods		378