Goodwill and Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Gross carrying amount	$ 44,384	$ 44,384
Accumulated amortization	(21,316)	(17,730)
Net carrying amount	23,068	26,654
Customer Relationships [Member]
Gross carrying amount	32,177	32,177
Accumulated amortization	(13,084)	(10,846)
Trade Names [Member]
Gross carrying amount	3,440	3,440
Accumulated amortization	(1,471)	(1,241)
Management Agreement [Member]
Gross carrying amount	3,232	3,232
Accumulated amortization	(2,895)	(2,087)
Noncompete Agreements [Member]
Gross carrying amount	4,235	4,235
Accumulated amortization	(3,866)	(3,556)
Insurance Licenses [Member]
Gross carrying amount	1,300	1,300
Accumulated amortization	$ 0	$ 0