Income Taxes (Details 4) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of beginning and ending balances of unrecognized tax benefits
Beginning balance of unrecognized tax benefits	$ 1,511,000	$ 1,733,000	$ 7,406,000
Gross increases-tax positions in prior period	1,325,000	146,000	500,000
Gross decreases-tax positions in prior period		(368,000)	(7,406,000)
Gross increases-tax positions in the current period			1,233,000
Ending balance of unrecognized tax benefits	2,836,000	1,511,000	1,733,000
Portion of unrecognized tax benefits, if recognized, would impact the effective tax rate	2,400,000	1,000,000	1,300,000
Accrued interest expense	$ 249,000	$ 35,000