Stock-Based Compensation Stock Options (Tables)

9 Months Ended

Dec. 31, 2016

Share-based Compensation Arrangement by Share-based Payment Award

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]

	Three Months Ended December 31,				Nine Months Ended December 31,
	2016		2015		2016		2015
Stock options	$	2,084	$	2,231	$	6,368	$	7,270
Restricted stock and restricted stock units	12,509		13,313		39,823		39,666
Employee stock purchase plan	110		108		527		548
Affiliate management equity plans	818		1,212		21,134		3,815
Non-employee director awards	—		—		1,150		1,150
Performance share units	1,032		665		2,901		2,108
Employee stock trust	6		6		19		19
Total stock-based compensation expense	$	16,559	$	17,535	$	71,922	$	54,576

Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding [Table Text Block]

	Nine Months Ended December 31,
	2016				2015
	Number of Shares		Weighted-Average Exercise Price Per Share		Number of Shares		Weighted-Average Exercise Price Per Share
Options outstanding at March 31	4,506		$	38.48	4,432		$	39.58
Granted	753		31.31		876		54.52
Exercised	(128	)	27.80		(254	)	31.96
Canceled/forfeited	(333	)	36.62		(418	)	91.83
Options outstanding at December 31	4,798		$	37.77	4,636		$	38.11

Management [Member]

Share-based Compensation Arrangement by Share-based Payment Award

Assumptions used to determine the weighted-average fair value of option grants

	Nine Months Ended December 31,
	2016		2015
Expected dividend yield	1.45	%	1.18	%
Risk-free interest rate	1.25	%	1.44	%
Expected volatility	30.95	%	24.37	%
Expected life (in years)	5.02		4.97

Chief Executive Officer [Member]

Share-based Compensation Arrangement by Share-based Payment Award

Assumptions used to determine the weighted-average fair value of option grants

Expected dividend yield	1.48	%
Risk-free interest rate	0.86	%
Expected volatility	44.05	%

Key Employees [Member]

Share-based Compensation Arrangement by Share-based Payment Award

Assumptions used to determine the weighted-average fair value of option grants

	2016		2015
Expected dividend yield	2.87	%	1.46	%
Risk-free interest rate	0.89	%	0.86	%
Expected volatility	26.01	%	22.63	%