Other Comprehensive Income (Loss) (Details 2) $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($)
Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive income (loss), balance at beginning of period, net	$ 174,507
Accumulated other comprehensive income (loss), balance at end of period, net	82,165
Unrealized/Recognized Gains (Losses)
Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive income (loss), balance at beginning of period, net	174,507
Other comprehensive income (loss) before reclassifications	29,593
Amounts reclassified from accumulated other comprehensive income (loss)	(121,935)
Accumulated other comprehensive income (loss), balance at end of period, net	$ 82,165