Annual report pursuant to Section 13 and 15(d)

Business and Summary of Significant Accounting Principles (EPS Calculations) (Details)

v2.4.0.8
Business and Summary of Significant Accounting Principles (EPS Calculations) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Class of Stock [Line Items]                      
Allocation of undistributed earnings $ (6,923) $ 8,905 $ 4,180 $ 3,244 $ 562 $ 3,700 $ 3,982 $ 1,429 $ 9,406 $ 9,673 $ 5,724
Basic earnings per share (USD per share) $ (0.17) $ 0.22 $ 0.10 $ 0.08 $ 0.01 $ 0.09 $ 0.10 $ 0.03      
Diluted earnings per share (USD per share) $ (0.17) $ 0.22 $ 0.10 $ 0.08 $ 0.01 $ 0.09 $ 0.09 $ 0.03      
Class A Common Stock [Member]
                      
Class of Stock [Line Items]                      
Allocation of undistributed earnings                 8,678 8,938 5,323
Number of shares used in basic computation                 37,732 38,560 42,175
Basic earnings per share (USD per share)                 $ 0.23 $ 0.23 $ 0.13
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares                 728 735 401
Reallocation of undistributed earnings as a result of conversion of dilutive securities                   0 0
Effect of share based compensation that may be settled in cash or shares                 0 (13) (367)
Net income adjusted for allocation of undistributed earnings                 9,406 9,660 5,357
Conversion of Class B to Class A common shares outstanding                 3,166 3,170 3,175
Unexercised stock options                 142 158 322
Number of shares used in per share computations                 41,040 42,119 45,889
Diluted earnings per share (USD per share)                 $ 0.23 $ 0.23 $ 0.12
Effect of share based compensation that may be settled in cash or shares                   231 217
Class B Common Stock [Member]
                      
Class of Stock [Line Items]                      
Allocation of undistributed earnings                 728 735 401
Number of shares used in basic computation                 3,166 3,170 3,175
Basic earnings per share (USD per share)                 $ 0.23 $ 0.23 $ 0.13
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares                 0 0 0
Reallocation of undistributed earnings as a result of conversion of dilutive securities                   (8) (30)
Effect of share based compensation that may be settled in cash or shares                 (3) 0 0
Net income adjusted for allocation of undistributed earnings                 $ 725 $ 727 $ 371
Conversion of Class B to Class A common shares outstanding                 0 0 0
Unexercised stock options                 0 0 0
Number of shares used in per share computations                 3,166 3,170 3,175
Diluted earnings per share (USD per share)                 $ 0.23 $ 0.23 $ 0.12
Effect of share based compensation that may be settled in cash or shares                   0 0