Acquisition and Disposals - Allied - Acquisition Consideration (Narrative) (Details) - USD ($) $ in Thousands		9 Months Ended
	Feb. 01, 2016	Sep. 30, 2016
Business Acquisition [Line Items]
Indefinite-lived intangible assets acquired during the period		$ 8,000
Finite-lived intangible assets acquired		28,948
Goodwill acquired during the period		$ 14,084
Allied International Holdings, Inc.
Business Acquisition [Line Items]
Cash consideration	$ 75,700
Contingent Consideration Measurement Period	3 years
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low	$ 7,500
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	30,000
Business Combination, Contingent Consideration, Liability	15,000
Total acquisition consideration	90,700
Fair value of net assets acquired and liabilities assumed	76,700
Indefinite-lived intangible assets acquired during the period	8,000
Finite-lived intangible assets acquired	6,000
Goodwill acquired during the period	14,100
Measurement period		12 months
Allied International Holdings, Inc. | Insurance Segment
Business Acquisition [Line Items]
Goodwill acquired during the period	$ 14,100