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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
The following table presents the Company's time-based and performance-based stock option activity for the current period:
 
Time-Based
 
Performance-Based
 
Options Outstanding
 
Weighted Average Exercise Price (in dollars per share)
 
Options Exercisable
 
Weighted Average Exercise Price (in dollars per share)
 
Options Outstanding
 
Weighted Average Exercise Price (in dollars per share)
 
Options Exercisable
 
Weighted Average Exercise Price (in dollars per share)
Balance, December 31, 2013
1,930,407

 
$
4.22

 
1,806,251

 
$
3.98

 
289,306

 
$
8.46

 
—

 
$
—

Granted
15,000

 
8.27

 
—

 
—

 
—

 
—

 
—

 
—

Vested
—

 
—

 
3,125

 
2.81

 
—

 
—

 
—

 
—

Exercised
(391,389
)
 
3.10

 
(391,389
)
 
3.10

 
—

 
—

 
—

 
—

Canceled/forfeited
(74,176
)
 
7.90

 
(74,176
)
 
7.90

 
—

 
—

 
—

 
—

Balance, June 30, 2014
1,479,842

 
$
4.37

 
1,343,811

 
$
4.02

 
289,306

 
$
8.46

 
—

 
$
—

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Weighted average remaining contractual term at June 30, 2014 (in years)
3.5

 
 
 
3.0

 
 
 
8.3

 
 
 
—

 
 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
The following table presents the weighted average assumptions used to estimate the fair values of all stock options granted during the six months ended June 30, 2014:
 
Assumptions
Expected term (years)
6.25

Expected volatility
33.83
%
Expected dividends
—
%
Risk-free rate
2.19
%
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]
The following table presents the Company's time-based and performance-based restricted stock award activity for the current period:
 
Time-Based
 
Performance-Based
 
Shares
 
Weighted Average Grant Date Fair Value
 
Shares
 
Weighted Average Grant Date Fair Value
Balance at December 31, 2013
139,680

 
$
8.59

 
130,629

 
$
10.20

Grants
114,944

 
7.24

 
—

 
—

Vests
(45,651
)
 
8.50

 
—

 
—

Forfeitures
—

 
—

 
—

 
—

Balance at June 30, 2014
208,973

 
$
7.87

 
130,629

 
$
10.20
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]
The following table presents the total time-based and performance-based stock-based compensation expense and the related income tax benefit recognized on the Consolidated Statements of Income:
 
For the Three Months Ended June 30,
 
For the Six Months Ended June 30,
 
2014
 
2013
 
2014
 
2013
Personnel costs
$
156

 
$
204

 
$
315

 
$
388

Other operating expenses
135

 
124

 
266

 
242

Income tax benefit
(111
)
 
(126
)
 
(222
)
 
(241
)
Net stock-based compensation expense
$
180

 
$
202

 
$
359

 
$
389

Additional information on total non-vested stock-based compensation is as follows:
At June 30, 2014
 
Stock Options
 
Restricted Stock Awards
Unrecognized compensation cost related to non-vested awards
$
338

 
$
1,357

Weighted-average recognition period (in years)
3.0

 
3.3
Schedule of Unrecognized Compensation Cost, Nonvested Awards [Table Text Block]
Additional information on total non-vested stock-based compensation is as follows:
At June 30, 2014
 
Stock Options
 
Restricted Stock Awards
Unrecognized compensation cost related to non-vested awards
$
338

 
$
1,357

Weighted-average recognition period (in years)
3.0

 
3.3
Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block]
The following table presents the information related to the Company's ESPP for the six-month offering period ending on:
 
June 30, 2014
 
June 30, 2013
Common stock issued under the ESPP (in shares)
18,642

 
26,019

Weighted-average purchase price per share by participant in the ESPP
$
6.04

 
$
5.83

Total cash proceeds received from the issuance of common shares under the ESPP
$
113

 
$
152

ESPP compensation costs recognized
$
32

 
$
46