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]
Compensation expense for stock awards	$ 802	$ 695	$ 348
Stock option expense	$ 1,437	$ 1,093	$ 480
Capital lease obligation period	20 years		20 years