Long-Term Borrowings (Details)	3 Months Ended			1 Months Ended	3 Months Ended				1 Months Ended		3 Months Ended	1 Months Ended								1 Months Ended	3 Months Ended
	Sep. 30, 2013 2010 Senior Facilities Agreement [Member] USD ($)	Sep. 30, 2012 2010 Senior Facilities Agreement [Member] USD ($)	Sep. 30, 2013 2010 Senior Facilities Agreement [Member] KRW	Oct. 28, 2013 2013 Senior Facilities Agreement [Member] item	Sep. 30, 2013 2013 Senior Facilities Agreement [Member]	Sep. 30, 2013 Facility A Loan [Member] KRW	Sep. 30, 2013 Facility B Loan [Member]	Sep. 30, 2013 Facility A And C Loans [Member]	Oct. 29, 2013 Subsequent Event [Member] Revolving Credit Facility [Member] KRW	Oct. 29, 2013 Subsequent Event [Member] 2010 Senior Facilities Agreement [Member] KRW	Dec. 31, 2013 Subsequent Event [Member] 2010 Senior Facilities Agreement [Member] USD ($)	Oct. 28, 2013 Subsequent Event [Member] 2013 Senior Facilities Agreement [Member]	Oct. 28, 2013 Subsequent Event [Member] Facility A Loan [Member] USD ($)	Oct. 28, 2013 Subsequent Event [Member] Facility A Loan [Member] KRW	Oct. 28, 2013 Subsequent Event [Member] Facility B Loan [Member] USD ($)	Oct. 28, 2013 Subsequent Event [Member] Facility B Loan [Member] KRW	Oct. 28, 2013 Subsequent Event [Member] Facility C Loan [Member] USD ($)	Oct. 28, 2013 Subsequent Event [Member] Facility C Loan [Member] KRW	Oct. 29, 2013 Subsequent Event [Member] Facility A And B Loans [Member] KRW	Oct. 29, 2012 Third Scheduled Principal Repayment [Member] 2010 Senior Facilities Agreement [Member] USD ($)	Sep. 30, 2013 Fifth Scheduled Principal Repayment [Member] 2010 Senior Facilities Agreement [Member] USD ($)	Sep. 30, 2013 Sixth Scheduled Principal Repayment [Member] 2010 Senior Facilities Agreement [Member] USD ($)	Sep. 30, 2013 Final Installment [Member] Facility A Loan [Member] KRW
Debt Instrument [Line Items]
Secured loan facility	$ 85,400,000		92,400,000,000																75,000,000,000
Long-term debt carrying value	85,400,000
Interest rate on credit facility	6.76%
Interest expense	1,400,000	1,900,000
Principal repayment										92,400,000,000	400,000									7,300,000	7,500,000	7,500,000
Repayments of long term debt, using cash on hand										17,400,000,000
Senior secured facilities term												5 years
Number of seperate facility agreements				3
Maximum borrowing capacity													55,500,000	60,000,000,000	13,900,000	15,000,000,000	9,200,000	10,000,000,000
Proceeds from Lines of Credit									1,100,000,000
Margin added on rate							2.90%	3.10%
Interest rate at period end					2.66%
Commitment fee percent					0.30%
Annual installments						10,000,000,000																	30,000,000,000
Payment installments beginning period, after initial drawdown						30 months