Income Taxes (Details 4) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Change in unrecognized tax benefits
Balance, beginning of the year	$ 4,473,000	$ 4,279,000
Additions for tax positions of current year	2,048,000	194,000
Additions for tax positions of prior years	502,000
Settlements	(2,525,000)
Balance, end of the year	4,498,000	4,473,000	4,279,000
Portion of Unrecognized tax benefits, if recognized, would impact effective tax rate	2,900,000	2,900,000
Interest and penalties expense or benefit relating to uncertain tax positions	400,000	200,000	400,000
Accrued interest and penalties relating to uncertain tax positions	$ 3,000,000	$ 3,400,000