Significant Accounting Policies Income Tax Policy (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2015
Accounting Policies [Abstract]
Current Income Tax Expense (Benefit)	$ 7,026	$ 17,527
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	7.80%		11.70%