Condensed Unaudited Consolidated Balance Sheets - Entity [Domain] - USD ($) $ in Thousands		Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents		$ 70,889	$ 68,505
Pledged cash deposits		32,810	33,633
Short-term investments		37,760	41,017
Accounts and notes receivable, net - unrelated parties		276,648	282,348
Accounts and notes receivable, net - related parties		27,003	22,760
Advance payments and others - unrelated parties		2,538	2,124
Advance payments and others - related parties		784	741
Inventories		67,794	64,419
Current deferred tax assets		7,334	7,078
Total current assets		523,560	522,625
Non-current assets:
Property, plant and equipment, net	[1]	83,027	82,466
Intangible assets, net		3,124	3,419
Other receivables, net - unrelated parties		1,825	1,619
Other receivables, net - related parties		19	76
Advance payment for property, plant and equipment - unrelated parties		8,481	6,755
Advance payment for property, plant and equipment - related parties		2,693	2,085
Long-term investments		6,380	4,575
Goodwill		646	645
Non-current deferred tax assets		5,458	4,896
Total assets		635,213	629,161
Current liabilities:
Bank and government loans		45,387	43,988
Accounts and notes payable - unrelated parties		209,777	213,090
Accounts and notes payable - related parties		5,198	4,857
Customer deposits		1,224	1,885
Accrued payroll and related costs		5,963	7,554
Accrued expenses and other payables		35,296	35,429
Accrued pension costs		5,450	5,586
Taxes payable		8,331	11,557
Amounts due to shareholders/directors		380	380
Current deferred tax liabilities		165	189
Total current liabilities		317,171	324,515
Long-term liabilities:
Advances payable		3,708	6,156
Non-current deferred tax liabilities		302	321
Total liabilities		$ 321,181	$ 330,992
Commitments and Contingencies (See Note 29)
Stockholders’ equity:
Common stock, $0.0001 par value - Authorized - 80,000,000 shares; Issued - 32,338,302 and 32,338,302 shares as of June 30, 2015 and December 31, 2014, respectively		$ 3	$ 3
Additional paid-in capital		64,522	64,522
Retained earnings-
Appropriated		10,349	10,178
Unappropriated		195,434	179,435
Accumulated other comprehensive income		36,297	36,119
Treasury stock - 217,283 and 217,283 shares as of June 30, 2015 and December 31, 2014, respectively		(1,000)	(1,000)
Total parent company stockholders' equity		305,605	289,257
Non-controlling interests		8,427	8,912
Total stockholders' equity		314,032	298,169
Total liabilities and stockholders' equity		$ 635,213	$ 629,161

[1] As of June 30, 2015 and December 31, 2014, the Company had pledged property, plant and equipment with net book value of $44.1 million and $45.5 million, respectively, for its comprehensive credit facilities with banks in China.