v2.4.0.8

Stockholders' Equity (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended				0 Months Ended				9 Months Ended		0 Months Ended	9 Months Ended		40 Months Ended	99 Months Ended	9 Months Ended		83 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		May 21, 2013 Regular Semi-Annual Dividend	Nov. 07, 2012 Regular Semi-Annual Dividend	Nov. 06, 2013 Regular Semi-Annual Dividend Subsequent Event [Member]	Nov. 07, 2012 Special Dividend	Sep. 30, 2013 2005 401(k) Stock Repurchase Program	Sep. 30, 2012 2005 401(k) Stock Repurchase Program	May 17, 2010 2010 Stock Repurchase Program	Sep. 30, 2013 2010 Stock Repurchase Program	Sep. 30, 2012 2010 Stock Repurchase Program	Sep. 30, 2013 2010 Stock Repurchase Program	Sep. 30, 2013 2005 401(k) Stock Repurchase Program	Sep. 30, 2013 2006 Director and Officer Repurchase Program	Sep. 30, 2012 2006 Director and Officer Repurchase Program	Sep. 30, 2013 2006 Director and Officer Repurchase Program
Schedule of Shareholders' Equity [Line Items]
Stock repurchase program authorized percentage															5.00%
Stock repurchase program amount authorized (in shares)															1.95
Stock repurchased during period (in shares)													0.21	0.21		0	0	1.10	3.00	0.03	0.13	1.10
Aggregate price of shares repurchased since inception																		$ 11.5	$ 29.0			$ 11.8
Average price of shares repurchased since inception (per share)																		$ 10.69	$ 9.67			$ 10.47
Dividends declared (per share)	$ 0	[1]	$ 0	[1]	$ 0.10	[1]	$ 0.08	[1]	$ 0.10	$ 0.08	$ 0.10	$ 0.08
Stock split, conversion ratio					1.5
[1] Reflects three-for-two stock split effective July 2, 2013

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Share based compensation number of reserved shares for potential issuance as a percentage of outstanding common stock.

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Aggregate dividends declared during the period for each share of common stock outstanding.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Stock Split

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The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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-Name Regulation S-X (SX)

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