Subsequent Events	3 Months Ended
Mar. 31, 2013
Subsequent Events [Abstract]
Subsequent Events	Note 10 — Subsequent Events On April 3, 2013 the Company commenced a “modified Dutch auction” self-tender offer to repurchase up to $130 million of its common stock at a price per share within the range of $32.00 to $36.00. A “modified Dutch auction” self-tender offer allows stockholders to indicate how many shares and at what price within the company’s specified range (in increments of $0.25 per share) they wish to tender. When the tender offer expired, based upon the number of shares tendered and the prices specified by the tendering stockholders, the Company determined the purchase price, which was the lowest price per share within the range that enabled the Company to purchase up to $130 million of its common stock. The tender offer expired on May 1, 2013 and the Company purchased 2,054,732 shares of its common stock on May 7, 2013 at a purchase price per of $36.00 per share for an aggregate price of $74.0 million, excluding expenses related to the tender offer.

Subsequent Events

3 Months Ended

Mar. 31, 2013

Note 10 — Subsequent Events

On April 3, 2013 the Company commenced a “modified Dutch auction” self-tender offer to repurchase up to $130 million of its common stock at a price per share within the range of $32.00 to $36.00. A “modified Dutch auction” self-tender offer allows stockholders to indicate how many shares and at what price within the company’s specified range (in increments of $0.25 per share) they wish to tender. When the tender offer expired, based upon the number of shares tendered and the prices specified by the tendering stockholders, the Company determined the purchase price, which was the lowest price per share within the range that enabled the Company to purchase up to $130 million of its common stock. The tender offer expired on May 1, 2013 and the Company purchased 2,054,732 shares of its common stock on May 7, 2013 at a purchase price per of $36.00 per share for an aggregate price of $74.0 million, excluding expenses related to the tender offer.