Investment in Global - Unrealized Loss Position (Details) - Jun. 30, 2015 - Investment in Global - USD ($) $ in Thousands	Total
Unrealized Loss Position Less Than 12 Months - Fair Value	$ 6,947
Unrealized Loss Position Less Than 12 Months - Unrealized Loss	(3,032)
Total Unrealized Loss Position - Fair Value	6,947
Total Unrealized Loss Position - Unrealized Loss	$ (3,032)