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Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2011
Subsequent Events Thru May 9 2011 [Abstract]
Subsequent Events [Text Block]	Subsequent Events Repurchases of Common Stock Since June 30, 2011 and through August 8, 2011 the Company has purchased an additional 1,059,000 shares of its outstanding common stock for aggregate consideration in the amount of $20.1 million and at an average rate of $19.00 per share. All share repurchases were done in accordance with Rule 10b-18 of the Securities Act of 1934 as to the timing, pricing, and volume of such transactions, and were completed using available cash resources and cash generated from the Company's operating activities.