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Equity Compensation Plans (Tables)
 12 Months Ended
Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Equity Compensation Plans
The unamortized compensation cost of awards issued under the Incentive Plan and purchases under the Employee Stock Purchase Plan totaled $24 million at December 31, 2015, as shown in the following table.
Table 17.1 – Activities of Equity Compensation Costs by Award Type
 
 
Year Ended December 31, 2015
(In Thousands)
 
Restricted Stock
 
Deferred Stock Units
 
Performance Stock Units
 
Employee Stock Purchase Plan
 
Total
Unrecognized compensation cost at beginning of period
 
$
1,091

 
$
12,304

 
$
6,874

 
$
—

 
$
20,269

Equity grants
 
2,781

 
9,425

 
3,375

 
236

 
15,817

Equity grant forfeitures
 
(387
)
 
(170
)
 
—

 
—

 
(557
)
Equity compensation expense
 
(1,092
)
 
(7,167
)
 
(3,426
)
 
(236
)
 
(11,921
)
Unrecognized Compensation Cost at End of Period
 
$
2,393

 
$
14,392

 
$
6,823

 
$
—

 
$
23,608
Restricted Stock Outstanding
Table 17.2 – Restricted Stock Activities
 
Years Ended December 31,
 
2015
 
2014
 
2013
 
Shares
 
Weighted
Average
Grant Date
Fair Market
Value
 
Shares
 
Weighted
Average
Grant Date
Fair Market
Value
 
Shares
 
Weighted
Average
Grant Date
Fair Market
Value
Outstanding at beginning of period
109,464

 
$
15.97

 
166,941

 
$
15.01

 
190,088

 
$
13.12

Granted
141,069

 
19.03

 
2,574

 
19.42

 
52,103

 
18.71

Vested
(42,675
)
 
14.87

 
(44,209
)
 
13.44

 
(48,615
)
 
12.63

Forfeited
(20,678
)
 
18.74

 
(15,842
)
 
13.45

 
(26,635
)
 
13.14

Outstanding at End of Period
187,180

 
$
18.22

 
109,464

 
$
15.97

 
166,941

 
$
15.01
Deferred Stock Units Activity
The following table summarizes the activities related to DSUs for the years ended December 31, 2015, 2014, and 2013.
Table 17.3 – Deferred Stock Units Activities
 
Years Ended December 31,
 
2015
 
2014
 
2013
 
Units
 
Weighted
Average
Grant Date
Fair Market
Value
 
Units
 
Weighted
Average
Grant Date
Fair Market
Value
 
Units
 
Weighted
Average
Grant Date
Fair Market
Value
Outstanding at beginning of period
2,168,824

 
$
16.20

 
2,266,473

 
$
15.41

 
2,361,285

 
$
14.46

Granted
583,958

 
16.11

 
350,769

 
19.62

 
552,250

 
19.31

Distributions
(335,461
)
 
14.20

 
(440,548
)
 
14.82

 
(558,008
)
 
15.51

Forfeitures
(10,167
)
 
16.60

 
(7,870
)
 
19.06

 
(89,054
)
 
11.18

Balance at End of Period (1)
2,407,154

 
$
16.45

 
2,168,824

 
$
16.20

 
2,266,473

 
$
15.41

(1)
PSU activity, including the number of PSUs outstanding, granted, distributed, and forfeited is not included in this table. Vested PSUs become vested DSUs prior to distribution, but are excluded from the table above and are described below under the heading "Performance Stock Units."
Summary of Activity Related to ESPP
The following table summarizes the activities related to the ESPP for the years ended December 31, 2015, 2014, and 2013.
Table 17.4 – Employee Stock Purchase Plan Activities
 
Years Ended December 31,
(In Thousands)
2015
 
2014
 
2013
Balance at beginning of period
$
3

 
$
3

 
$
3

Employee purchases
475

 
494

 
518

Cost of common stock issued
(460
)
 
(494
)
 
(518
)
Balance at End of Period
$
18

 
$
3

 
$
3
Summary of Activity Related to Executive Deferred Compensation Plan
The following table summarizes the cash account activities related to the EDCP for the years ended December 31, 2015, 2014, and 2013.
Table 17.5 – EDCP Cash Accounts Activities
 
Years Ended December 31,
(In Thousands)
2015
 
2014
 
2013
Balance at beginning of period
$
2,049

 
$
1,882

 
$
1,516

New deferrals
600

 
575

 
656

Accrued interest
61

 
70

 
58

Withdrawals
(615
)
 
(478
)
 
(348
)
Balance at End of Period
$
2,095

 
$
2,049

 
$
1,882