Significant Accounting Policies Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accounting Policies [Abstract]
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Percent	6.70%			4.40%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	$ 4,055
Current Income Tax Expense (Benefit)	$ 2,200	$ (7,026)	$ (17,527)
Effective Income Tax Rate Reconciliation, Tax Settlement, Percent	1.90%			1.20%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	3.50%	7.80%		2.30%	11.70%