Schedule IV Reinsurance (Details) - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2016	[1]	Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015	[1]	Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2016	Dec. 31, 2015		Dec. 31, 2014
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct Premiums Earned																	$ 999,093	$ 973,645		$ 905,502
Ceded Premiums Earned																	77,359	57,780		61,017
Assumed Premiums Earned																	35	43		43
Net premiums earned—insurance	$ 233,585		$ 238,149		$ 229,085		$ 220,950		$ 226,443		$ 227,433		$ 237,437		$ 224,595		$ 921,769	$ 915,908	[1]	$ 844,528
Premiums, Percentage Assumed to Net																	0.00%	0.00%		0.01%

[1] For all periods presented, reflects changes to align our segment reporting structure with recent changes in personnel reporting lines and management oversight related to contract underwriting performed on behalf of third parties. Revenue and expenses for this business are now reflected in the Services segment. As a result, for all periods presented, Services revenue and cost of services have increased, with offsetting reductions in other operating expenses.