Long-term Debt Narrative (Details) (USD $)	1 Months Ended	6 Months Ended	1 Months Ended	6 Months Ended
	Mar. 31, 2010 Revolving Credit Facility [Member] China Merchants Bank Co. (CMB) [Member]	Jun. 30, 2014 Revolving Credit Facility [Member] China Merchants Bank Co. (CMB) [Member]	Mar. 31, 2010 Revolving Credit Facility [Member] China Merchants Bank Co. (CMB) [Member] Eurodollar Borrowing [Member]	Jun. 30, 2014 Revolving Credit Facility [Member] China Merchants Bank Co. (CMB) [Member] Eurodollar Borrowing [Member]	May 13, 2013 Senior Notes [Member]	Jun. 30, 2014 Brazil Bank Debt [Member]
Long-term Debt and Interest Rate Caps (Textual) [Abstract]
Principal amount of debt					$ 175,000,000	$ 4,200,000
Stated rate on debt					8.125%
Revolving line of credit, Maximum		175,000,000
Debt instrument basis spread on variable rate under option one		0.50%	3.50%	2.40%
Debt instrument basis spread on variable rate under option two		1.00%
Debt instrument basis spread on variable rate under option three	2.50%	1.40%
Outstanding term loan indebtedness under Credit Facility		$ 0
Fixed charge coverage ratio		1.125
Leverage ratio		3.25
Percentage of tangible net worth for covenants compliance	60.00%
Average rate on long-term debt						15.42%