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Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - 6 months ended Jun. 30, 2015 - USD ($)
$ in Thousands
Common Stock [Member]
Common Class A [Member]
Common Stock [Member]
Common Class B [Member]
Additional Paid-in Capital [Member]
AOCI Attributable to Parent [Member]
Retained Earnings [Member]
Total
Balances at December 31, 2014 at Dec. 31, 2014 $ 168 $ 24 $ 141,248 $ (13,101) $ 40,865 $ 169,204
Net income         $ 21,228 21,228
Other comprehensive income       $ 3,712   3,712
Exercise of stock options $ 1   $ 1,091     1,092
Stock-based employee compensation expense $ 1   599     600
Issuance of restricted shares     (1,586)     (1,586)
Income tax benefit arising from restricted share vesting and option exercise     1,757     1,757
Balances at June 30, 2015 at Jun. 30, 2015 $ 170 $ 24 $ 143,109 $ (9,389) $ 62,093 $ 196,007