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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2012
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share |
(in thousands, except market price data) |  | 2012 |  | 2011 |  | 2010
Net income available to common shareholders |  | $30,977 |  |  | $34,938 |  |  | $37,636
Weighted average number of shares: |  |  |  |  |  |  |  |
Weighted average number of shares used in |  |  |  |  |  |  |  |
calculating basic net income/(loss) per share |  | 31,356 |  |  | 31,262 |  |  | 31,072
Effect of dilutive stock-based compensation plans: |  |  |  |  |  |  |  |
Stock options |  | 57 |  |  | 104 |  |  | 44
Long-term incentive plan |  | 223 |  |  | 144 |  |  | 93
Weighted average number of shares used in |  |  |  |  |  |  |  |
calculating diluted net income per share |  | 31,636 |  |  | 31,510 |  |  | 31,209
Effect of stock-based compensation plans |  |  |  |  |  |  |  |
that were not included in the computation of |  |  |  |  |  |  |  |
diluted earnings per share because |  |  |  |  |  |  |  |
to do so would have been antidilutive |  | - |  |  | - |  |  | -
Average market price of common stock used |  |  |  |  |  |  |  |
for calculation of dilutive shares |  | $21.51 |  |  | $23.44 |  |  | $20.49
Net income per share: |  |  |  |  |  |  |  |
Basic |  | $0.99 |  |  | $1.12 |  |  | $1.21
Diluted |  | *$0.97 |  |  | $1.11 |  |  | $1.21
As of December 31, 2012, 2011, and 2010, there was no dilution resulting from the convertible debt instrument, purchased call option, and warrant that are described in Note 13.
* Due to a loss from continuing operations in 2012, the calculation of diluted income per share cannot be calculated by dividing net income by the diluted shares in the table above. See Statement of Income.

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- Definition Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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