Accrued Professional Liabilities - Rollforward of Reserves (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Self Insurance Reserve [Roll Forward]
Beginning balance	$ 1,171
Assumed liabilities through acquisitions	53,512
Provision related to current period reserves	5,423
Payments for current period reserves	(1,595)
Benefit related to changes in prior period reserves	(661)
Payments for prior period reserves	(6,055)
Other, net	1,990
Ending balance	$ 53,785