Annual report pursuant to Section 13 and 15(d)

Equity Compensation - Compensation Expense Information Based on Fair Value of Stock Options and RSU's (Details)

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Equity Compensation - Compensation Expense Information Based on Fair Value of Stock Options and RSU's (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]      
Stock Compensation Expense $ 3,098 $ 2,598 $ 2,281
Tax Benefit (179) (140) (145)
Stock Compensation Expense, Net of Tax $ 2,919 $ 2,458 $ 2,136