Acquistions Acquisitions (Details) (USD $)	1 Months Ended	12 Months Ended
	Jan. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds			$ 16,000,000
Assets of Disposal Group, Including Discontinued Operation			15,000,000
Goodwill			103,337,000	110,146,000
Premiums and fees receivable			1,681,674,000	1,557,480,000
After Market Original Equipment Manufacturer
Business Acquisition [Line Items]
Business Acquisition, Transaction Costs			83,000,000
Cash and cash equivalents			17,456,000	3,911,000
Real estate, furniture and equipment			669,000	898,000
Goodwill and other intangibles assets			77,967,000	64,464,000
Premiums and fees receivable			20,178,000	0
Other assets			0	60,661,000
Total assets acquired			116,270,000	129,934,000
Debt			0	(27,612,000)
Other liabilities assumed			(33,391,000)	(17,076,000)
Net assets acquired			82,879,000	85,246,000
Business Acquisition, Percentage of Voting Interests Acquired	51.00%	49.00%
Business Combination, Consideration Transferred	$ 43,000,000	$ 43,000,000