Acquisition and Discontinued Operations Acquisition of PWSC (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2018	Oct. 12, 2017
Business Acquisition [Line Items]
Other Intangible Assets, Net							$ 6,200
Liability for Unpaid Claims and Claims Adjustment Expense, Reported Claims, Amount						$ 2,500
Disposal Group, Including Discontinued Operation, Consideration						$ 1,700
(Loss) gain on disposal of discontinued operations, net of taxes	$ (1,172)		$ 0	$ (7,800)	$ 1,017
Cash and cash equivalents							2,071
Other receivables							50
Service fee receivable							1,422
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets							118
Property and equipment							238
Other assets	2,560	$ 4,302		2,560			206
Goodwill	74,659	80,843		74,659			2,867
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles							5,569
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets							627
Total assets	494,586	506,685		494,586			13,168
Deferred service fees							800
Accrued expenses and other liabilities	11,327	10,359		11,327			2,368
Total liabilities	$ 455,894	450,778		$ 455,894			$ 3,168
Purchase price		$ 10,000