Short-Term and Long-Term Obligations - Short-term Obligations (Details)					6 Months Ended	1 Months Ended			1 Months Ended						1 Months Ended				1 Months Ended												1 Months Ended
	Dec. 31, 2014 Revolving Credit Facility [Member] Line of Credit [Member] USD ($)	Jun. 30, 2014 Revolving Credit Facility [Member] Line of Credit [Member] USD ($)	Dec. 31, 2014 Bank of America [Member] Revolving Credit Facility [Member] Line of Credit [Member] USD ($)	Jun. 30, 2014 Bank of America [Member] Revolving Credit Facility [Member] Line of Credit [Member] USD ($)	Dec. 31, 2014 London Interbank Offered Rate (LIBOR) [Member] Bank of America [Member] Revolving Credit Facility [Member] Line of Credit [Member]	Oct. 31, 2011 Term Loan [Member] Bank of America [Member] USD ($)	Dec. 31, 2014 Term Loan [Member] Bank of America [Member] USD ($)	Jun. 30, 2014 Term Loan [Member] Bank of America [Member] USD ($)	Oct. 31, 2011 Term Loan [Member] London Interbank Offered Rate (LIBOR) [Member] Bank of America [Member]	Oct. 31, 2011 Line of Credit [Member] Bank of America [Member] Revolving Credit Facility [Member] USD ($)	Jul. 31, 2012 CTBC 2011 Facility [Domain] CTBC [Member] Term Loan [Member] USD ($)	Jul. 31, 2012 CTBC 2011 Facility [Domain] CTBC [Member] Term Loan [Member] TWD	Oct. 30, 2011 CTBC 2011 Facility [Domain] CTBC [Member] Revolving Credit Facility [Member] USD ($)	Oct. 30, 2011 CTBC 2011 Facility [Domain] CTBC [Member] Revolving Credit Facility [Member] TWD	Jul. 31, 2012 CTBC 2011 Facility [Domain] Term Loan [Member] CTBC [Member]	Dec. 31, 2014 CTBC 2014 Facility [Member] CTBC [Member] USD ($)	Dec. 31, 2014 CTBC 2014 Facility [Member] CTBC [Member] TWD	Dec. 31, 2014 CTBC 2014 Facility [Member] CTBC [Member] Term Loan [Member] USD ($)	Dec. 31, 2014 CTBC 2014 Facility [Member] CTBC [Member] Revolving Credit Facility [Member] Line of Credit [Member] USD ($)	Dec. 31, 2014 CTBC 2014 Facility [Member] CTBC [Member] Secured Debt [Member] Term Loan [Member] USD ($)	Dec. 31, 2014 CTBC 2014 Facility [Member] CTBC [Member] Secured Debt [Member] Term Loan [Member] TWD	Dec. 31, 2014 CTBC 2014 Facility [Member] CTBC's Established NTD Interest Rate [Member] CTBC [Member] Secured Debt [Member] Term Loan [Member]	Dec. 31, 2014 CTBC 2014 Facility [Member] CTBC's Established USD Interest Rate [Member] CTBC [Member] Revolving Credit Facility [Member] Line of Credit [Member]	Dec. 31, 2014 CTBC 2014 Facility [Member] Term Loan [Member] CTBC [Member] USD ($)	Dec. 31, 2014 Maximum [Member] Bank of America [Member]	Jun. 30, 2014 Maximum [Member] Bank of America [Member]	Dec. 31, 2014 Maximum [Member] CTBC 2014 Facility [Member] CTBC [Member]	Dec. 31, 2014 Minimum [Member] Bank of America [Member]	Jun. 30, 2014 Minimum [Member] Bank of America [Member]	Dec. 31, 2014 Minimum [Member] CTBC 2014 Facility [Member] CTBC [Member]	Jan. 30, 2015 Subsequent Event [Member] Bank of America [Member] Revolving Credit Facility [Member] Line of Credit [Member] USD ($)	Jan. 30, 2015 Subsequent Event [Member] Maximum [Member] Bank of America [Member] Revolving Credit Facility [Member] Line of Credit [Member]	Jan. 30, 2015 Subsequent Event [Member] Minimum [Member] Bank of America [Member] Revolving Credit Facility [Member] Line of Credit [Member]
Short-term Debt [Line Items]
Amount of assets as collateral for debt instrument			$ 890,370,000	$ 751,396,000			$ 17,469,000	$ 17,584,000										$ 27,202,000
Interest rate, period end																									1.66%	1.65%	1.14%	1.41%	1.19%	0.94%
Credit facility, term						5 years													12 months	12 months	12 months
Credit facility, maximum borrowing capacity										40,000,000			9,898,000	300,000,000		31,453,000	1,000,000,000		17,000,000	22,017,000	700,000,000
Term loan, face amount						14,000,000					14,912,000	450,000,000
Credit facility, basis spread on variable rate					1.25%				1.50%						0.30%							0.25%	0.30%
LIBOR rate					0.16%
Short-term debt, total outstanding balance	9,899,000	17,699,000	4,699,000	17,699,000															5,200,000					20,760,000
Credit facility, remaining borrowing capacity			35,301,000													5,494,000	174,676,000
Proceeds from line of credit																															$ 15,000,000
Line of credit facility, interest rate during period																																2.75%	1.40%
Percent of eligible accounts receivable																			80.00%