Revenue Recognition (Schedule of Disaggregated Revenue) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Disaggregated revenues	$ 149,100
Implicit	(2,833)
Net disaggregated revenues	147,163
Short-Term Core Service Jobs [Member]
Disaggregated revenues	104,086
Water Restoration [Member]
Disaggregated revenues	27,737
Contractor Revenue [Member]
Disaggregated revenues	12,365
Franchise Fees [Member]
Disaggregated revenues	1,592
All Other [Member]
Disaggregated revenues	3,320
Implicit Price Concessions and Credit Memos [Member]
Implicit	$ (1,937)