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Shareholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2012
Equity [Abstract] |
Changes in shareholders' equity that are attributable to the Company's shareholders and to noncontrolling interests | The following table presents the changes in shareholders’ equity that are attributable to the Company’s shareholders and to noncontrolling interests (in thousands):
| Common shares |  | Additional Paid-In |  | Retained |  | Accumulated Other Comprehensive |  | Treasury shares |  | Noncontrolling |  | Total Shareholders'
| Shares |  | Amount |  | Capital |  | Earnings |  | Income (Loss) |  | Shares |  | Amount |  | Interests |  | Equity
Balance at January 1, 2012 | 61,181 |  |  | $ | 852 |  |  | $ | 727,297 |  |  | $ | 507,170 |  |  | $ | 1,930 |  |  | 24,004 |  |  | $ | (214,031 | ) |  | $ | 15,303 |  |  | $ | 1,038,521 |
Stock option and restricted stock award transactions | 479 |  |  | 5 |  |  | 1,841 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,846 |
Tax benefit related to equity compensation | — |  |  | — |  |  | 241 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 241 |
Stock-based compensation expense | — |  |  | — |  |  | 5,113 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 5,113 |
Dividends paid | — |  |  | — |  | — |  | — |  | — |  | (12,304 | ) | — |  | — |  |  | — |  |  | — |  |  | — |  |  | (12,304 | )
Cancellation of restricted stock | (28 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Retirement of common stock | (58 | ) |  | (1 | ) |  | (628 | ) |  | (406 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | (1,035 | )
Purchase of treasury shares | (2 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | 2 |  |  | (48 | ) |  | — |  |  | (48 | )
Reissuance of treasury stock in connection with the ESPP | 20 |  |  | — |  |  | 4 |  |  | (1 | ) |  | — |  |  | (20 | ) |  | 370 |  |  | — |  |  | 373 |
Acquisition of ownership interests in MCF | — |  |  | — |  |  | (18,856 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | (8,085 | ) |  | (26,941 | )
Other adjustments to additional paid-in capital | — |  |  | — |  |  | (51 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (51 | )
Distribution to noncontrolling interests | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (5,758 | ) |  | (5,758 | )
Total comprehensive income | — |  |  | — |  |  | — |  |  | 53,143 |  |  | (361 | ) |  | — |  |  | — |  |  | (900 | ) |  | 51,882 |
Balance at September 30, 2012 | 61,592 |  |  | $ | 856 |  |  | $ | 714,961 |  |  | $ | 547,602 |  |  | $ | 1,569 |  |  | 23,986 |  |  | $ | (213,709 | ) |  | $ | 560 |  |  | $ | 1,051,839 |

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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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