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Share-Based Compensation - (Tables)
 6 Months Ended
Jun. 30, 2015
Share-based Compensation [Abstract]  
Summary of restricted stock unit activity [Table Text Block]
A summary of the Company’s nonvested restricted stock unit activity with respect to the six months ended June 30, 2015 is as follows:


Number of Shares

Weighted Average Grant Date Fair Value
Nonvested at December 31, 2014

805


$
11.07

Granted

792


$
10.57

Less: Vested

503


$
10.32

Less: Forfeited

13


$
10.99

Nonvested at June 30, 2015

1,081


$
11.06