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Share Compensation and Pension Plans (Tables)
 12 Months Ended
Dec. 31, 2016
Share-based Compensation [Abstract]  
Key assumptions used in determining the fair value of options granted
The key assumptions used in determining the fair value of options granted in 2016, 2015 and 2014 and a summary of the methodology applied to develop each assumption were as follows:
 
 
2016
 
2015
 
2014
Assumptions:
 
 
 
 
 
 
Volatility
 
28.70
%
 
37.60
%
 
51.40
%
Risk-free interest rate
 
1.67
%
 
1.55
%
 
1.77
%
Weighted average expected lives in years
 
5.5 years

 
5.5 years

 
6.1 years

Forfeiture rate
 
1.66
%
 
2.16
%
 
3.45
%
Dividend yield rate
 
3.55
%
 
4.05
%
 
3.46
%
Schedule of all options granted, exercised, expired and forfeited under the Plan
The following table shows all options granted, exercised, expired and exchanged under the Plan for the years ended December 31, 2016, 2015 and 2014:
 
Number of
Share
Options
 
Weighted
Average
Exercise
Price
 
Weighted Average Grant-Date Fair Value
 
Weighted
Average
Remaining
Contractual
Term
 
Aggregate
Intrinsic
Value
 
Range of
Exercise
Prices
Outstanding, December 31, 2013
2,439,413

 
$
6.76

 
 
 
5.75 years
 
$
10,174

 
$3.28 - $11.22
Granted
45,000

 
$
12.01

 
$
4.28

 
 
 
 
 
$11.38 - $12.42
Exercised
(120,596
)
 
$
4.91

 
 
 
 
 
$
930

 
 
Forfeited
(842
)
 
$
7.74

 
 
 
 
 
 
 
 
Outstanding, December 31, 2014
2,362,975

 
$
6.95

 
 
 
4.86 years
 
$
13,791

 
$3.28 - $12.42
Granted
24,000

 
$
13.98

 
$
3.31

 
 
 
 
 
$13.98
Exercised
(456,776
)
 
$
7.27

 
 
 
 
 
$
3,521

 
 
Expired
(3,442
)
 
$
8.61

 
 
 
 
 
 
 
 
Forfeited
(558
)
 
$
9.00

 
 
 
 
 
 
 
 
Outstanding, December 31, 2015
1,926,199

 
$
6.96

 
 
 
4.15 years
 
$
15,306

 
$3.28 - $13.98
Granted
24,000

 
$
13.12

 
$
2.45

 
 
 
 
 
$13.12
Exercised
(265,110
)
 
$
7.28

 
 
 
 
 
$
1,453

 
 
Expired
(1,000
)
 
$
7.67

 
 
 
 
 
 
 
 
Outstanding, December 31, 2016
1,684,089

 
$
7.00

 
 
 
3.36 years
 
$
17,598

 
$3.28 - $13.98
Total exercisable at December 31, 2016
1,650,027

 
$
6.88

 
 
 
3.22 years
 
$
17,433

 
$3.28 - $13.98
Schedule of based compensation instrument granted, other than share options
The following schedule shows the summary of activity under the Company's restricted awards:
 
 
CEO Non-Performance-Based Restricted Share Units
 
Non-CEO Non-Performance-Based Restricted Shares
 
Performance Based Restricted Share Units(1)
 
 
Number of
Restricted Units
 
Weighted Average Grant-Date Fair Value
 
Number of
Restricted Shares
 
Weighted Average Grant-Date Fair Value
 
Number of
Restricted Units
 
Weighted Average Grant-Date Fair Value
Non-vested December 31, 2013
 
149,701

 
$
10.02

 
95,590

 
$
10.02

 
753,862

 
$
9.21

Awards granted
 
70,298

 
$
11.38

 
38,522

 
$
11.38

 
396,672

 
$
11.38

Awards vested
 
(73,333
)
 
$
10.45

 
(47,795
)
 
$
10.02

 
(100,308
)
 
$
8.56

Awards forfeited
 
—

 
$
—

 
—

 
$
—

 
(242,456
)
 
$
8.56

Non-vested at December 31, 2014
 
146,666

 
$
10.45

 
86,317

 
$
10.63

 
807,770

 
$
10.51

Awards granted
 
64,795

 
$
13.89

 
38,180

 
$
13.94

 
291,730

 
$
13.89

Awards vested
 
(73,333
)
 
$
10.45

 
(67,061
)
 
$
10.41

 
(188,681
)
 
$
9.54

Awards forfeited
 
—

 
$
—

 
(4,284
)
 
$
11.38

 
(165,337
)
 
$
10.61

Non-vested at December 31, 2015
 
138,128

 
$
12.07

 
53,152

 
$
13.22

 
745,482

 
$
12.05

Awards granted
 
75,988

 
$
13.16

 
23,000

 
$
12.90

 
355,544

 
$
13.11

Awards vested
 
(94,931
)
 
$
11.24

 
(29,949
)
 
$
12.67

 
(85,847
)
 
$
12.29

Awards forfeited
 
—

 
$
—

 
—

 
$
—

 
(169,458
)
 
$
10.02

Non-vested at December 31, 2016
 
119,185

 
$
13.42

 
46,203

 
$
13.42

 
845,721

 
$
12.88

(1) For Performance Based Shares, the number of shares is stated at the maximum number that can be attained if the performance conditions are met. Forfeitures represent shares forfeited due to vesting below the maximum attainable as a result of the Company not fully meeting the performance conditions.