Supplemental Statement of Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplemental investing and financing activities:
Cash paid for interest	$ 1,974	$ 5,655	$ 7,272
Cash paid for income taxes, net	$ 5,714	$ 6,182	$ 8,616