Long-Term Incentive Plan (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended						1 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Restricted Shares and Performance awards	Mar. 31, 2013 Restricted Shares and Performance awards	Mar. 31, 2014 Restricted Shares and Performance awards Minimum	Mar. 31, 2014 Restricted Shares and Performance awards Maximum	Aug. 31, 2011 Time Based Award [Member] Kenneth E. Cruse	Aug. 31, 2011 Performance Based Award [Member] Kenneth E. Cruse
Long-Term Incentive Plan
Vesting period					3 years	5 years
Percentage of total shares granted represented by each award							60.00%	40.00%
Period after the grant date for vesting (in years)							third, fourth and fifth anniversary	fifth anniversary
Compensation Expense, including forfeitures			$ 2,036	$ 1,602
Net-settle adjustment			(664)
Amortization related to shares issued to design and construction employees	114	93	114
Vesting of restricted stock presented on statement of equity	$ 1,486		$ 1,486