Commitments, Contingencies and Guarantees (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2014	$ 8,231,000
2015	6,893,000
2016	5,866,000
2017	4,419,000
2018	2,711,000
Later years	10,149,000
Total	38,269,000
Operating Leases, Rent Expense	11,400,000	9,800,000	9,000,000
Partnership Interest [Member] | Unconsolidated Construction Joint Venture [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Contract Value of Active Construction Joint Venture Projects	4,400,000,000
Reporting Entitys Interest in Joint Venture [Member] | Unconsolidated Construction Joint Venture [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Contract Value of Active Construction Joint Venture Projects	1,200,000,000
Other Partners Interest in Joint Venture [Member] | Unconsolidated Construction Joint Venture [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Contract Value of Active Construction Joint Venture Projects	3,200,000,000
Surety Bond [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Other Commitment	$ 1,800,000,000