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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Accumulated Other Comprehensive Loss [Member]
Total
Balance at Dec. 31, 2013 $ 23,647 $ 20,614 $ 192,088 $ (37,884) $ (19,379) $ 179,086
Net income     38,628     38,628
Other comprehensive income, net of deferred taxes         $ 19,379 19,379
Dividends paid     (31,446)     (31,446)
Stock-based compensation   5,647       5,647
Exercise of stock options and vesting of RSU's   (2,340)       (2,340)
Tax benefit realized from exercise of stock options and vesting of RSU's   1,621       1,621
Common stock issued - compensation plans 70 (70)        
Unpaid dividends accrued     (1,111)     (1,111)
Repurchase of shares of common stock       (24,002)   (24,002)
Balance at Dec. 31, 2014 23,717 25,472 198,159 (61,886)   185,462
Net income     62,126     62,126
Dividends paid     (20,569)     (20,569)
Stock-based compensation   4,530       4,530
Exercise of stock options and vesting of RSU's   (788)       (788)
Tax benefit realized from exercise of stock options and vesting of RSU's   436       436
Common stock issued - compensation plans 59 (59)        
Unpaid dividends accrued     (618)     (618)
Repurchase of shares of common stock       (2,841)   (2,841)
Balance at Dec. 31, 2015 23,776 29,591 239,098 (64,727)   227,738
Net income     87,472     87,472
Dividends paid     (32,815)     (32,815)
Stock-based compensation   3,054       3,054
Exercise of stock options and vesting of RSU's   (14,002)       (14,002)
Tax benefit realized from exercise of stock options and vesting of RSU's   8,826       8,826
Common stock issued - compensation plans 258 (258)        
Unpaid dividends accrued     (355)     (355)
Repurchase of shares of common stock       (14,018)   (14,018)
Balance at Dec. 31, 2016 $ 24,034 $ 27,211 $ 293,400 $ (78,745)   $ 265,900