Progressive Acquisition Purchase Price (Details) (Progressive Finance Holdings, LLC, USD $) In Thousands, unless otherwise specified	0 Months Ended		12 Months Ended
	Apr. 14, 2014		Dec. 31, 2014
Business Acquisition [Line Items]
Proceeds from Long-term Debt			$ 491,300
Cash Consideration	185,454
Deferred Cash Consideration	29,106
Estimated Purchase Price	705,810	[1]
Senior Notes | Senior Unsecured Notes, 4.75% Note Due 2017
Business Acquisition [Line Items]
Proceeds from Long-term Debt	300,000
Senior Notes | Senior Unsecured Notes, 3.95% Due 2018
Business Acquisition [Line Items]
Proceeds from Long-term Debt	126,250
Line of Credit | Credit Facility, 2014 | Revolver
Business Acquisition [Line Items]
Proceeds from Long-term Debt	$ 65,000

[1] As previously reported in the notes to consolidated financial statements included in our Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2014.