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Summary of Significant Accounting Policies and Other Information - Schedule of Inventory, Current (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016
Inventories, Net
Raw materials	$ 71,732	$ 70,498	$ 102,912	$ 92,360
Work in process	4,535	9,270	12,315	6,021
Finished goods	16,684	30,862	52,136	11,904
Total Inventories	92,951	110,630	167,363	110,285
Inventory allowance	(6,227)	(10,082)	(5,268)	(4,035)
Inventories, net	86,724	100,548	162,095	106,250	$ 113,074	$ 103,335	$ 97,286	$ 111,133	$ 115,062	$ 139,519
Allowance for Doubtful Accounts Receivable
Balance at beginning of period	10,082	5,268	4,035	2,982
Charged to expense	421	5,341	1,712	1,856
Write-offs	(4,276)	(527)	(479)	(803)
Balance at end of year	$ 6,227	$ 10,082	$ 5,268	$ 4,035

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