Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies [Line Items]
Net rental expense	$ 2,200,000	$ 2,200,000	$ 1,700,000
Future Obligations for Minimum Rentals Under Non-Cancelable Operating Lease Commitments
2014	1,715,000
2015	1,579,000
2016	1,449,000
2017	1,336,000
2018	993,000
Thereafter	8,843,000
Total lease commitments	$ 15,915,000
Minimum [Member]
Commitments and Contingencies [Line Items]
Lease Term, Facilities	5 years
Maximum [Member]
Commitments and Contingencies [Line Items]
Lease Term, Facilities	10 years
Lease Term, Equipment	5 years