Earnings Per Share - Narrative (Details) - $ / shares shares in Thousands	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Shares of common stock owned by the subsidiary (shares)	785	785
Stock Options
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share (shares)	427	427
Weighted average exercise price of antidilutive shares (USD per share)	$ 60.00	$ 60.00