v2.4.0.6

Subsequent Event	3 Months Ended
	Mar. 31, 2013
Subsequent Events [Abstract]
Subsequent Event [Text Block]	Subsequent Event Stock Repurchases Subsequent to March 31, 2013, we repurchased 65,339 shares of our common stock under the stock repurchase program authorized by the Board of Directors on March 8, 2013. The average price paid per share was $43.34.

X

- Details

Name:	us-gaap_SubsequentEventsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventsTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration