Annual report pursuant to Section 13 and 15(d)

Business and Summary of Significant Accounting Principles (Shareholders Equity Statements Immaterial Error Correction) (Details)

v2.4.0.6
Business and Summary of Significant Accounting Principles (Shareholders Equity Statements Immaterial Error Correction) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Beginning balances, retained earnings $ 97,911 $ 92,200 $ 83,589
Net income 9,162 5,486 8,610
Ending balances, retained earnings 107,584 97,911 92,200
Beginning balances, total stockholders' equity 173,647 199,099 265,255
Ending balances, total stockholders' equity 189,436 173,647 199,099
Scenario As Previously Reported [Member]
      
Beginning balances, retained earnings   93,607 84,651
Net income   5,601 8,955
Ending balances, retained earnings   99,433 93,607
Beginning balances, total stockholders' equity   200,506 266,317
Ending balances, total stockholders' equity   175,169 200,506
Adjustment [Member]
      
Beginning balances, retained earnings   (1,407) (1,062)
Net income   (115) (345)
Ending balances, retained earnings   (1,522) (1,407)
Beginning balances, total stockholders' equity   (1,407) (1,062)
Ending balances, total stockholders' equity   $ (1,522) $ (1,407)