Stock-Based Compensation Stock Options (Tables)

3 Months Ended

Jun. 30, 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 June 30,
	2016		2015
Stock options	$	2,242	$	2,805
Restricted stock and restricted stock units	14,573		13,898
Employee stock purchase plan	301		325
Affiliate management equity plans	19,499		1,301
Performance share units	850		536
Employee stock trust	6		6
Total stock-based compensation expense	$	37,471	$	18,871

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

	Three Months Ended June 30,
	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	(56	)	29.04		(161	)	32.94
Canceled/forfeited	(42	)	43.93		(5	)	84.31
Options outstanding at June 30	5,161		$	37.49	5,142		$	42.29

Management [Member]

Share-based Compensation Arrangement by Share-based Payment Award

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

	Three Months Ended June 30,
	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	%