Progressive Acquisition Pro Forma Financial Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Business Acquisition [Line Items]
Revenues, as reported	$ 672,510	$ 550,545	$ 1,257,933	$ 1,143,555
Net earnings, as reported	8,505	25,854	46,844	76,854
Progressive Finance Holdings, LLC
Business Acquisition [Line Items]
Revenues, pro forma			1,427,106	1,325,928
Net earnings, pro forma			$ 49,654	$ 66,845