Long-Term Debt and Credit Facility - Narrative (Details)	1 Months Ended	12 Months Ended
	Oct. 31, 2015	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Mar. 31, 2017	Oct. 30, 2015 USD ($)
Debt Instrument [Line Items]
Credit facility retired amount						$ 344,700,000
Debt issuance costs		$ 3,406,000	$ 4,294,000
Interest expense		15,029,000	16,044,000	$ 12,943,000
Proceeds from line of credit		42,000,000	26,000,000	$ 18,000,000
Other long-term debt		9,600,000	9,600,000
Other loans payable		300,000	100,000
Long-term debt fair value		$ 366,000,000	349,100,000
BPPC
Debt Instrument [Line Items]
Other long-term debt			1,900,000
2015 Interest Rate Swap
Debt Instrument [Line Items]
Notional amount						$ 262,500,000
Derivative fixed interest rate						1.46%
London Interbank Offered Rate (LIBOR) | 2015 Interest Rate Swap
Debt Instrument [Line Items]
Derivative, variable interest rate (as percent)		3.07%
2015 Credit Facility
Debt Instrument [Line Items]
Debt instrument face amount						$ 650,000,000
Credit facility borrowing capacity						350,000,000
Line of credit facility expiration period	5 years
Debt term	5 years
Business combination consideration paid			4,400,000
Debt issuance costs			1,800,000
Third party arranging fees			2,600,000
Unamortized loan costs			3,500,000
Interest expense			800,000
Secure debt		$ 328,100,000	345,600,000
Proceeds from line of credit		36,000,000
Letters of credit outstanding		$ 28,200,000
Line of credit outstanding			$ 0
Amount of hedged item						262,500,000
Credit facility maximum consolidated leverage ratio		3.75
Credit facility actual consolidated leverage ratio		3.51
Credit facility, remaining borrowing capacity		$ 53,500,000
Credit facility minimum consolidated fixed charge ratio		1.25
Credit facility actual consolidated fixed charge ratio		1.51
2015 Credit Facility | Scenario, Forecast
Debt Instrument [Line Items]
Credit facility maximum consolidated leverage ratio					3.75
2015 Credit Facility | Insurance Carriers Collateral
Debt Instrument [Line Items]
Letters of credit outstanding		$ 15,400,000
2015 Credit Facility | Performance Guarantee
Debt Instrument [Line Items]
Letters of credit outstanding		12,800,000
2015 Credit Facility | Small Acquisition
Debt Instrument [Line Items]
Proceeds from line of credit		3,000,000
2015 Credit Facility | Underground Solutions
Debt Instrument [Line Items]
Proceeds from line of credit		$ 30,000,000
Credit facility maximum consolidated leverage ratio		4.00
Credit facility maximum consolidated leverage ratio period		1 year
2015 Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Debt basis spread on variable rate (as percent)		1.25%
2015 Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Debt basis spread on variable rate (as percent)		2.25%
Line of Credit | 2015 Credit Facility
Debt Instrument [Line Items]
Credit facility borrowing capacity						$ 300,000,000
Proceeds from line of credit		$ 3,000,000