Acquisition Consideration transferred and assets obtained and liabilities assumed (Details) - USD ($) $ in Thousands	Dec. 30, 2015	Sep. 30, 2016	Dec. 31, 2015
Recognized amounts of identifiable assets acquired and liabilities assumed:
Goodwill		$ 27,908	$ 23,409
J Devices [Member]
Fair value of consideration transferred:
Cash	$ 105,391
Fair value of our previously held equity interest in J-Devices	160,087
Total	265,478
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash	127,968
Accounts receivable	180,177
Inventory	42,502
Other current assets	2,363
Property, plant and equipment	230,319
Other assets	9,268
Short-term borrowings and current portion of long-term debt	(36,770)
Other current liabilities	(251,405)
Long-term debt	(18,885)
Pension obligations	(22,250)
Other non-current liabilities	(21,218)
Total identifiable net assets	242,069
Goodwill	23,409
Total	265,478
Previously Reported [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed:
Goodwill			19,443
Previously Reported [Member] | J Devices [Member]
Fair value of consideration transferred:
Cash	105,391
Fair value of our previously held equity interest in J-Devices	167,684
Total	273,075
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash	127,968
Accounts receivable	180,177
Inventory	42,502
Other current assets	2,363
Property, plant and equipment	230,319
Other assets	9,268
Short-term borrowings and current portion of long-term debt	(36,770)
Other current liabilities	(251,405)
Long-term debt	(18,885)
Pension obligations	(22,250)
Other non-current liabilities	(9,655)
Total identifiable net assets	253,632
Goodwill	19,443
Total	273,075
Adjustment [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed:
Goodwill			$ 3,966
Adjustment [Member] | J Devices [Member]
Fair value of consideration transferred:
Cash	0
Fair value of our previously held equity interest in J-Devices	(7,597)
Total	(7,597)
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash	0
Accounts receivable	0
Inventory	0
Other current assets	0
Property, plant and equipment	0
Other assets	0
Short-term borrowings and current portion of long-term debt	0
Other current liabilities	0
Long-term debt	0
Pension obligations	0
Other non-current liabilities	(11,563)
Total identifiable net assets	(11,563)
Goodwill	3,966
Total	$ (7,597)