Commitments and Contingencies - Schedule of Contributions made to Multiemployer Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Multiemployer Plans [Line Items]
Contributions	$ 11,977	$ 11,992	$ 10,818
Pension Plans [Member]
Multiemployer Plans [Line Items]
Contributions	3,155	3,077	2,871
Pension Plans [Member] | Multiemployer Plan, Individually Insignificant Multiemployer Plans [Member]
Multiemployer Plans [Line Items]
Contributions	800	700	800
Health Plans [Member]
Multiemployer Plans [Line Items]
Contributions	8,280	8,296	7,628
Health Plans [Member] | Multiemployer Plan, Individually Insignificant Multiemployer Plans [Member]
Multiemployer Plans [Line Items]
Contributions	1,600	1,400	1,500
Other [Member]
Multiemployer Plans [Line Items]
Contributions	542	619	319
Other [Member] | Multiemployer Plan, Individually Insignificant Multiemployer Plans [Member]
Multiemployer Plans [Line Items]
Contributions	$ 200	$ 200	$ 80