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Shareholders' Equity (Details) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Oct. 02, 2011 | Sep. 30, 2012 | Oct. 02, 2011
Class of Stock [Line Items] |  |  |  |
Common Stock, Dividends, Per Share, Declared |  |  | $ 0.20 |
Cash dividends paid |  |  | $ 12,304,000 | $ 0
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests |  |  |  |
Beginning Balance |  |  | 1,038,521,000 |
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests |  |  | 8,100,000 |
Retirement of common stock, shares |  |  | (57,457) |
Acquisition of ownership interests in MCF |  |  | 35,154,000 | 0
Comprehensive income (loss): |  |  |  |
Total comprehensive income | 14,842,000 | 13,772,000 | 51,882,000 | 52,117,000
Ending Balance | 1,051,839,000 |  | 1,051,839,000 |
Common Stock [Member] |  |  |  |
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests |  |  |  |
Beginning Balance |  |  | 852,000 |
Beginning Balance, Shares |  |  | 61,181,000 |
Stock option and restricted stock award transactions, shares |  |  | 479,000 |
Stock option and restricted stock award transactions |  |  | 5,000 |
Cancellation of restricted stock, shares |  |  | (28,000) |
Cancellation of restricted stock, Value |  |  | 0 |
Retirement of common stock, shares |  |  | (58,000) |
Retirement of common stock, Value |  |  | (1,000) |
Treasury Stock, Shares, Acquired |  |  | (2,000) |
Stock Issued During Period, Shares, Treasury Stock Reissued |  |  | (20,000) |
Comprehensive income (loss): |  |  |  |
Ending Balance | 856,000 |  | 856,000 |
Ending Balance, Shares | 61,592,000 |  | 61,592,000 |
Additional Paid-in Capital [Member] |  |  |  |
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests |  |  |  |
Beginning Balance |  |  | 727,297,000 |
Stock option and restricted stock award transactions |  |  | 1,841,000 |
Tax provision related to equity compensation |  |  | 241,000 |
Stock based compensation expense |  |  | 5,113,000 |
Cancellation of restricted stock, Value |  |  | 0 |
Retirement of common stock, Value |  |  | (628,000) |
Stock Issued During Period, Value, Treasury Stock Reissued |  |  | 4,000 |
Acquisition of ownership interests in MCF |  |  | (18,856,000) |
Adjustments to Additional Paid in Capital, Other |  |  | (51,000) |
Comprehensive income (loss): |  |  |  |
Ending Balance | 714,961,000 |  | 714,961,000 |
Retained Earnings [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Cash dividends paid |  |  | (12,304,000) |
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests |  |  |  |
Beginning Balance |  |  | 507,170,000 |
Retirement of common stock, Value |  |  | (406,000) |
Stock Issued During Period, Value, Treasury Stock Reissued |  |  | (1,000) |
Comprehensive income (loss): |  |  |  |
Total comprehensive income |  |  | 53,143,000 |
Ending Balance | 547,602,000 |  | 547,602,000 |
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |  |
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests |  |  |  |
Beginning Balance |  |  | 1,930,000 |
Comprehensive income (loss): |  |  |  |
Total comprehensive income |  |  | (361,000) |
Ending Balance | 1,569,000 |  | 1,569,000 |
Treasury Stock [Member] |  |  |  |
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests |  |  |  |
Beginning Balance |  |  | (214,031,000) |
Beginning Balance, Shares |  |  | 24,004,000 |
Stock option and restricted stock award transactions |  |  | 0 |
Treasury Stock, Shares, Acquired |  |  | 2,000 |
Treasury Stock, Value, Acquired, Cost Method |  |  | (48,000) |
Stock Issued During Period, Value, Treasury Stock Reissued |  |  | 370,000 |
Stock Issued During Period, Shares, Treasury Stock Reissued |  |  | (20,000) |
Comprehensive income (loss): |  |  |  |
Ending Balance | (213,709,000) |  | (213,709,000) |
Ending Balance, Shares | 23,986,000 |  | 23,986,000 |
Noncontrolling Interest [Member] |  |  |  |
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests |  |  |  |
Beginning Balance |  |  | 15,303,000 |
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests |  |  | (8,085,000) |
Distribution to noncontrolling interest |  |  | (5,758,000) |
Adjustments to Additional Paid in Capital, Other |  |  | 0 |
Comprehensive income (loss): |  |  |  |
Total comprehensive income |  |  | (900,000) |
Ending Balance | 560,000 |  | 560,000 |
Stockholders' Equity, Total [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Cash dividends paid |  |  | (12,304,000) |
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests |  |  |  |
Beginning Balance |  |  | 1,038,521,000 |
Stock option and restricted stock award transactions |  |  | 1,846,000 |
Tax provision related to equity compensation |  |  | 241,000 |
Stock based compensation expense |  |  | 5,113,000 |
Cancellation of restricted stock, Value |  |  | 0 |
Retirement of common stock, Value |  |  | (1,035,000) |
Treasury Stock, Value, Acquired, Cost Method |  |  | (48,000) |
Stock Issued During Period, Value, Treasury Stock Reissued |  |  | 373,000 |
Acquisition of ownership interests in MCF |  |  | (26,941,000) |
Distribution to noncontrolling interest |  |  | (5,758,000) |
Adjustments to Additional Paid in Capital, Other |  |  | (51,000) |
Comprehensive income (loss): |  |  |  |
Total comprehensive income |  |  | $ 51,882,000 |

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