Revenue Recognition - Other Disclosures (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Receivable decreased	$ 328
Payable increased	229
Contract liabilities increase	5,158
Advance payments received from customer	16,377
Performance obligations satisfied, offset by cash collections
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Receivable decreased	2,780
Payable increased	1,727
Contract liabilities increase	3,844
Advance payments received from customer	$ 15,039