Segment Information (Revenues By Major Service Line) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue from External Customer
Revenues before reimbursements	$ 277,286	$ 293,335	$ 836,863	$ 885,510
U.S. Services
Revenue from External Customer
Revenues before reimbursements	56,470	62,080	173,813	185,683
Broadspire
Revenue from External Customer
Revenues before reimbursements	76,676	74,225	227,975	217,590
U.S. Claims Field Operations | U.S. Services
Revenue from External Customer
Revenues before reimbursements	21,598	21,468	62,207	65,164
U.S. Technical Services | U.S. Services
Revenue from External Customer
Revenues before reimbursements	7,126	7,661	21,056	21,747
U.S. Catastrophe Services | U.S. Services
Revenue from External Customer
Revenues before reimbursements	9,198	17,305	35,153	54,274
Subtotal U.S. Claims Services | U.S. Services
Revenue from External Customer
Revenues before reimbursements	37,922	46,434	118,416	141,185
U.S. Contractor Connection | U.S. Services
Revenue from External Customer
Revenues before reimbursements	18,548	15,646	55,397	44,498
Workers' Compensation, Disability and Liability Claims Management | Broadspire
Revenue from External Customer
Revenues before reimbursements	32,028	30,583	95,910	90,120
Medical Management Services | Broadspire
Revenue from External Customer
Revenues before reimbursements	41,149	39,983	121,433	116,301
Risk Management Information Services | Broadspire
Revenue from External Customer
Revenues before reimbursements	$ 3,499	$ 3,659	$ 10,632	$ 11,169