Progressive Acquisition Pro Forma Financial Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Business Acquisition [Line Items]
Revenues, as reported	$ 707,564	$ 537,224	$ 1,965,497	$ 1,680,779
Net earnings, as reported	9,295	21,138	56,139	97,992
Progressive Finance Holdings, LLC
Business Acquisition [Line Items]
Revenues, pro forma			2,134,671	1,966,963
Net earnings, pro forma			$ 61,601	$ 82,982