Depreciation and amortization expenses, including depreciation of capitalized dry docking costs, were $23.0 million for the nine month period ending September 30, 2011 compared with $21.2 million for the same period of 2010. The increase was due to depreciation on the two vessels acquired during 2011 which was partially offset by impact on depreciation of increasing the residual value of our other vessels as of January 1, 2011.
Due to the weak tanker markets and decline in values for second hand tankers, the Company has recorded an impairment charge of $56.0 million in the third quarter. The impairment charge is a non-cash item. There was no impairment charge for the same period in 2010.
G&A for the first nine months of 2011 was $7.0 million including non-cash cost related to restricted share agreements for our management and board of directors, compared to $6.3 million for the prior year period. G&A for the first nine month period of 2011 includes a high level of activity including vessel inspections, equity offering, contemplated Saga Tankers acquisition, and fleet expansion.
Net financial expenses were $5.0 million for the first nine months of 2011 compared to $17.1 million in the prior year period. Net financial expenses for the period included a net non-cash gain on interest rate swaps of $0.5 million. The decline in net financial expense is mainly due to the expiry of an interest swap in October 2010, a $3.7 million cost related to the early termination of $35 million of interest rate swaps as well as higher non-cash swap expenses in the same period in 2010.
We had a net loss for the nine month period ending September 30, 2011 of $44.5 million or $0.72 per diluted share. Adjusted for the non-cash impairment charge, we had a net income of $11.5 or $0.19 per share for the period compared to net loss of $0.1 million or $(0.01) per diluted share for the prior year period. After adjusting for non-cash the impairment charge and non-cash financial items related to interest rate swaps, net income for the nine month period ending September 30, 2011 was $11.0 million or $0.18 per diluted share compared to $1.2 million or $0.02 per diluted share, for the prior year period. Operating cash flow after debt service
was $8.2 million as a result of the $24 million voluntary prepayment under the RBS credit agreement or $0.13 per share compared to $22.5 million or $0.46 per diluted share, for the prior year period. Operating cash flow for the nine month period excluding the $24 million voluntary debt prepayment was $32.2 million, or $0.52 per share.
For the nine month period ended September 30, 2011, net cash flows provided by operating activities was $24.0 million, compared to $23.2 million for the prior-year period. Lower net income in the nine months of 2011 compared with the same period of 2010 was a result of the non cash impairment charge in the 2011 period and use of cash for operating assets and liabilities during the first nine months of 2011 mainly related to working capital requirements related to the two vessels which commenced their employment in the Tankers International Pool and lower prepaid charter hire.