Organization and Significant Accounting Policies - New Accounting Pronouncements (Details) - USD ($) $ in Thousands	Apr. 01, 2017	Apr. 01, 2016	Mar. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Tax Impact from Estimated Transition Tax Repatriation Charge			$ 79,300
ASU 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment to retained earnings	$ 203
Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment to retained earnings		$ 130