Quarterly report pursuant to Section 13 or 15(d)

Share-Based Payments - Non-employee Director Non-vested Shares (Details)

v3.4.0.3
Share-Based Payments - Non-employee Director Non-vested Shares (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-Employee Director Shares, Vesting Period (in years) 1 year  
Share-based compensation expense $ 1,952 $ 1,786
Nonemployee Director Nonvested Shares Granted Member    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding and non-vested, beginning of period (in shares) 15  
Grants in Period 0  
Shares Vested in Period 0  
Outstanding and non-vested, end of period (in shares) 15  
Outstanding and non-vested, weighted-average grant date fair value, beginning of period $ 51  
Grants in Period, Weighted Average Grant Date Fair Value 0  
Vested in Period, Weighed-average grant date fair value 0  
Outstanding and non-vested, weighted-average grant date fair value, end of period $ 51  
Outstanding and non-vested, aggregate grant date fair value $ 740  
Share-based compensation expense 171 160
Tax benefit related to share-based expense 64 61
Unrecognized share-based compensation, net of estimated forfeitures $ 114 $ 96
Weighted average period over which unrecognized compensation will be recognized (years) 3 months 11 days