Investments - Held-to-maturity securities (Details) $ in Thousands	Jun. 30, 2015 USD ($)
Schedule of Held-to-maturity Securities [Line Items]
Carrying Value	$ 14,450
Unrealized Gain	11
Unrealized Loss	(37)
Fair Value	14,424
Fixed Income Bonds
Schedule of Held-to-maturity Securities [Line Items]
Carrying Value	3,526
Unrealized Gain	0
Unrealized Loss	(32)
Fair Value	3,494
Time Deposits
Schedule of Held-to-maturity Securities [Line Items]
Carrying Value	10,924
Unrealized Gain	11
Unrealized Loss	(5)
Fair Value	$ 10,930