Income Taxes (Deferred tax assets and liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred Tax Assets, Net, Current Classification [Abstract]
Inventory cost	$ 6,158	$ 2,158
Accrued expenses and accounts receivable	2,047	1,754
Share based compensation and others	1,790	1,538
Total deferred tax assets, current	9,995	5,450
Deferred Tax Assets, Net, Noncurrent Classification [Abstract]
Plant, equipment and intangible assets	(3,775)	(1,818)
Foreign tax credits	22,391	19,354
Research and development tax credits	4,331	4,098
Net operating loss carryforwards	13,977	1,600
Accrued pension	10,089	11,750
Share based compensation and others	21,646	23,945
Total deferred tax assets, include valuation allowance	68,659	58,929
valuation allowances	(28,876)	(28,099)
Total deferred tax assets, non-current	39,783	30,830
Deferred tax liabilities, non-current
Step up in basis - acquisition	(2,964)	(3,967)
Total deferred tax liabilities, non-current	(2,964)	(3,967)
Total deferred tax assets, non-current	$ 36,819	$ 26,863