Share-Based Compensation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]
Share-based compensation incurred	$ 2,740	$ 2,831	$ 8,507	$ 8,002
Capitalized share-based compensation	(405)	(230)	(793)	(683)
Share-based compensation expense	2,335	2,601	7,714	7,319
Restricted Stock [Member]
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]
Share-based compensation incurred	2,671	2,754	8,284	7,644
Stock Options [Member]
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]
Share-based compensation incurred	$ 69	$ 77	$ 223	$ 358