Significant Accounting and Reporting Policies - Narrative (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) reporting_unit country contractor class_of_stock Rate	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Variable Interest Entity [Line Items]
Number of countries in which entity operates (more than) | country	70
Number of classes of common stock | class_of_stock	2
Number of residential and commercial contractors | contractor	6,000
Number of reporting units | reporting_unit	4
Goodwill and intangible asset impairment charges	$ 17,484,000	$ 0	$ 19,598,000
Property, plant and equipment, additions from finance leases	0	0	760,000
Depreciation	11,363,000	12,862,000	12,557,000
Self insurance reserve	26,838,000	29,078,000
Self insurance reserve, current	11,311,000	15,246,000
Change in tax rate, income tax expense		3,600,000	3,800,000
Valuation allowance, foreign		7,000,000
US tax reform - revaluation of deferred taxes	0	102,000	(3,756,000)
Release of transition tax of uncertain tax positions and adjustments	0	3,496,000	(7,550,000)
Foreign currency transaction gain (loss)	(243,000)	73,000	(685,000)
Advertising expense	2,394,000	3,572,000	7,091,000
Capitalized software
Variable Interest Entity [Line Items]
Amortization of intangible assets	17,873,000	20,066,000	$ 18,118,000
Outside the US
Variable Interest Entity [Line Items]
Time deposits, at carrying value	931,000
Primary Beneficiary
Variable Interest Entity [Line Items]
Deferred compensation plan liabilities	8,428,000	8,914,000
Deferred compensation plan assets	$ 16,527,000	16,402,000
Lloyd Warwick International
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage	51.00%
Variable interest entity, maximum loss exposure	$ 10,000,000
Class A Non-Voting
Variable Interest Entity [Line Items]
Approval rate to waive equal consideration rights	75.00%
Minimum | Capitalized software
Variable Interest Entity [Line Items]
Finite-lived intangible assets, remaining amortization period	3 years
Maximum | Capitalized software
Variable Interest Entity [Line Items]
Finite-lived intangible assets, remaining amortization period	10 years
Crawford Claims Solutions
Variable Interest Entity [Line Items]
Goodwill and intangible asset impairment charges	$ 17,484,000
Fair value inputs, increase in discount rate causing impairment loss | Rate	1.75%
Discount rate | Minimum
Variable Interest Entity [Line Items]
Measurement input	0.130
Discount rate | Maximum
Variable Interest Entity [Line Items]
Measurement input	0.145
Terminal growth rate
Variable Interest Entity [Line Items]
Measurement input	0.020
Lloyd Warwick International
Variable Interest Entity [Line Items]
Asset carrying amount	$ 14,686,000	12,232,000
Liability carrying amount	9,176,000	10,423,000
Lloyd Warwick International | Principal Owner
Variable Interest Entity [Line Items]
Liability carrying amount	$ 4,284,000	$ 6,934,000