Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions						3 Months Ended		9 Months Ended		64 Months Ended	107 Months Ended	123 Months Ended
	Oct. 29, 2015	May. 19, 2015	Nov. 04, 2014	May. 02, 2014	May. 17, 2010	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2015	May. 18, 2015
Schedule of Shareholders' Equity [Line Items]
Cash dividends declared per common share						$ 0	$ 0	$ 0.11	$ 0.09
Dividend Declared [Member]
Schedule of Shareholders' Equity [Line Items]
Cash dividends declared per common share		$ 0.11	$ 0.09	$ 0.09
Dividend Declared [Member] | Subsequent Event [Member]
Schedule of Shareholders' Equity [Line Items]
Cash dividends declared per common share	$ 0.11
2010 Stock Repurchase Program
Schedule of Shareholders' Equity [Line Items]
Stock repurchase program authorized percentage					5.00%
Stock repurchase program amount authorized (in shares)		5,700,000			2,900,000.0								2,750,000.00
Stock repurchased during period (in shares)								0	500,000	2,600,000
Aggregate price of shares repurchased since inception										$ 31.5
Average price of shares repurchased since inception (per share)										$ 11.97
2005 401(k) Stock Repurchase Program
Schedule of Shareholders' Equity [Line Items]
Stock repurchased during period (in shares)								400,000	300,000			5,400,000
Aggregate price of shares repurchased since inception												$ 48.4
Average price of shares repurchased since inception (per share)												$ 8.90
2006 Director and Officer Repurchase Program
Schedule of Shareholders' Equity [Line Items]
Stock repurchased during period (in shares)								20,000	50,000		1,800,000
Aggregate price of shares repurchased since inception											$ 14.6
Average price of shares repurchased since inception (per share)											$ 7.97