Related Party Transactions (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
NCC [Member]
Related Party Transaction [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
Cash contribution for acquisition of membership interest	$ 1,100,000
Office space occupied (in square feet)	54,800
Monthly rent expense (per month)	83,342
Related Party Rent expense	989,000	950,000	937,000
Other Leases [Member]
Related Party Transaction [Line Items]
Related Party Rent expense	$ 64,000	$ 178,000	$ 183,000