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Stockholders' Equity (Tables)
 12 Months Ended
Mar. 31, 2017
Stockholders' Equity Note [Abstract]  
Schedule of Stock Options, Valuation Assumptions
The following table presents the weighted-average valuation assumptions used for the recognition of stock compensation expense for the 2017 LTIP NQSOs granted during the year ended March 31, 2017:
Expected life (in years)
 
5.94

Expected volatility
 
41.8
%
Risk free interest rate
 
1.95
%
Dividend yield
 
—
%
 
 
 
Weighted-average exercise price
 
$
61.86

Weighted-average option value
 
$
26.27
Class of Treasury Stock
The following is a reconciliation of the Company's retained earnings for repurchases of its common stock during the year ended March 31, 2017:
 
Retained Earnings
Balance at March 31, 2016
$
826,449

Net income
5,710

Repurchases of common stock
(12,570
)
Balance at March 31, 2017
$
819,589
Summary of stock compensation amounts recognized in the consolidated statements of comprehensive income

The table below summarizes stock compensation expense by award or option type recognized in the consolidated statements of comprehensive income (loss):
 
Years Ended March 31,
 
2017
 
2016
 
2015
Stock compensation expense recorded for:
 
 
 
 
 
Annual RSUs
$
5,191

 
$
2,356

 
$
1,603

Annual PSUs
1,203

 
3,807

 
7,692

2007 LTIP SARs
(1,949
)
 
893

 
1,846

LTIP PSUs*
(296
)
 
(1,511
)
 
1,323

2017 LTIP NQSOs
694

 
—

 
—

Directors' shares
1,168

 
1,077

 
1,060

Employee Stock Purchase Plan**
164

 
—

 
—

Total stock compensation expense
6,175

 
6,622

 
13,524

Income tax benefit recognized
(2,322
)
 
(2,525
)
 
(5,143
)
Net stock compensation expense
$
3,853

 
$
4,097

 
$
8,381


*2007 LTIP PSUs, 2013 LTIP PSUs, 2015 LTIP PSUs, and 2016 LTIP PSUs are collectively referred to herein as “LTIP PSUs”.

**The 2015 Employee Stock Purchase Plan (2015 ESPP) provides for the initial authorization of 1,000,000 shares of the Company’s common stock for sale to eligible employees. Eligible employees commenced participation in the 2015 ESPP in March 2016 with payroll deductions. Each consecutive purchase period is six months in duration and shares are purchased on the last trading day of the purchase period at a price that reflects a 15% discount to the closing price on that date. Purchase windows take place in February and August of each fiscal year.
Summary of the total remaining unrecognized compensation cost related to nonvested awards, that are considered probable of vesting and the weighted-average period over which the cost is expected to be recognized
The table below summarizes the total remaining unrecognized stock compensation expense related to nonvested awards that the Company considers are probable to vest and the weighted-average period over which the cost is expected to be recognized as of March 31, 2017:
 
Unrecognized
Stock Compensation
Expense
 
Weighted-Average
Remaining
Vesting Period (Years)
Annual RSUs
$
7,497

 
1.4
Annual PSUs
454

 
1.0
2007 LTIP SARs
—

 
—
LTIP PSUs
—

 
—
2017 LTIP NQSOs
4,344

 
2.0
Total
$
12,295

 
 
Summary of Nonvested Stock Units
The table below summarizes Annual RSU and Annual PSU activity:
 
Number of
Shares
 
Weighted-
Average
Grant-Date
Fair Value
Nonvested at March 31, 2014
331,000

 
$
62.21

Granted
196,000

 
82.34

Vested
(142,000
)
 
68.39

Forfeited
(30,000
)
 
64.18

Cancelled*
(15,000
)
 
84.04

Nonvested at March 31, 2015
340,000

 
70.11

Granted
240,000

 
70.82

Vested
(132,000
)
 
66.74

Forfeited
(91,000
)
 
72.84

Cancelled*
(154,000
)
 
74.22

Nonvested at March 31, 2016
203,000

 
68.80

Granted
268,000

 
59.34

Vested
(111,000
)
 
65.37

Forfeited
(66,000
)
 
70.79

Cancelled*
(68,000
)
 
65.23

Nonvested at March 31, 2017
226,000

 
$
63.96



*Shares cancelled during the period represent Annual PSUs granted that did not meet the required performance criteria.
Summary of Stock Appreciation Rights Issued Under the 2006 Plan
The table below summarizes 2007 LTIP SARs activity:
 
Number of
2007 LTIP SARs
 
Weighted-
Average
Exercise
Price
 
Weighted-
Average
Remaining
Contractual
Term
(Years)
 
Aggregate
Intrinsic
Value
Outstanding at March 31, 2014
730,000

 
$
26.73

 
6.7
 
$
38,700

Exercised
(15,000
)
 
26.73

 
 
 
 
Outstanding at March 31, 2015
715,000

 
26.73

 
5.8
 
33,000

Exercised
(80,000
)
 
26.73

 
 
 
 
Forfeited
(15,000
)
 
26.73

 
 
 
 
Outstanding at March 31, 2016
620,000

 
26.73

 
3.5
 
20,600

Exercised
(290,000
)
 
26.73

 
 
 
 
Forfeited
(90,000
)
 
26.73

 
 
 
 
Outstanding at March 31, 2017
240,000

 
$
26.73

 
5.1
 
$
7,920

Exercisable at March 31, 2017
240,000

 
$
26.73

 
5.1
 
$
7,920
Summary of Restricted Stock Units Issued
The table below summarizes the LTIP PSU activity:
 
Number of
Shares
 
Weighted-
Average
Grant-Date
Fair Value
Nonvested at March 31, 2014
729,000

 
$
67.01

Granted
160,000

 
98.29

Forfeited
(35,000
)
 
78.39

Cancelled*
(230,000
)
 
82.09

Nonvested at March 31, 2015
624,000

 
68.82

Granted
308,000

 
50.05

Vested
(47,000
)
 
26.73

Forfeited
(232,000
)
 
70.98

Cancelled*
(264,000
)
 
63.22

Nonvested at March 31, 2016
389,000

 
61.53

Granted
7,000

 
56.56

Forfeited
(27,000
)
 
68.63

Cancelled*
(100,000
)
 
89.77

Nonvested at March 31, 2017
269,000

 
$
50.22



*Shares cancelled represent LTIP PSUs granted that did not meet the required performance criteria.
Schedule of Stock Options, Activity
The table below summarizes the 2017 LTIP NQSO:
 
Number of
Shares
 
Weighted-
Average
Grant-Date
Fair Value
 
Weighted-
Average
Remaining
Contractual
Term
(Years)
 
Aggregate
Intrinsic
Value
Outstanding at March 31, 2016
—

 
$
—

 
—

 
$
—

Granted
208,000

 
61.86

 
 
 
 
Forfeited
(16,000
)
 
61.86

 
 
 
 
Outstanding at March 31, 2017
192,000

 
$
61.86

 
9.0
 
$
—

Exercisable at March 31, 2017
—

 
$
—

 
—

 
$
—