CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Cash Flows [Abstract]
Net capitalized interest	$ 1,038	$ 456	$ 299
Company's common stock surrendered in exchange for the exercise of stock options (in shares)	45	131	78