Long-Term Incentive Plan (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended		3 Months Ended		6 Months Ended				1 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Restricted Shares and Performance awards	Jun. 30, 2013 Restricted Shares and Performance awards	Jun. 30, 2014 Restricted Shares and Performance awards	Jun. 30, 2013 Restricted Shares and Performance awards	Jun. 30, 2014 Restricted Shares and Performance awards Minimum	Jun. 30, 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			$ 2,671	$ 1,838	$ 4,707	$ 3,440
Net-settle adjustment					(1,391)
Amortization related to shares issued to design and construction employees	234	193			234
Vesting of restricted stock presented on statement of equity	$ 3,550				$ 3,550