Sales of goods
Sales of goods for the year ended December 31, 2016 was $3,046,546 thousand, a decrease of $951,554 thousand, or 24%, from $3,998,100 thousand for the year ended December 31, 2015, primarily attributable to the Equipment segment. North American locomotive deliveries as well the demand for replacement parts declined. Challenges in the coal and petroleum industries led to a decrease in carload volumes, which in turn led to a significant increase in the number of parked locomotives.
Sales of services
Sales of services for the year ended December 31, 2016 was $1,560,045 thousand, an increase of $136,666 thousand, or 10%, from $1,423,379 thousand for the year ended December 31, 2015, primarily driven by the Services segment. North America maintenance and non-U.S. sales of services were both favorable compared to the prior year. Increased sales of services were also due in part to growth in sales of Digital.
Total revenues
Total revenues for the year ended December 31, 2016 was $4,606,591 thousand, a decrease of $814,888 thousand, or 15%, from $5,421,479 thousand for the year ended December 31, 2015. The decline in total revenues was primarily attributable to the Equipment segment. Non-U.S. revenues increased as a percentage of total revenues over 2015, up to 38% of total revenues compared to 31% of total revenues in 2015.
Cost of goods sold
Cost of goods sold for the year ended December 31, 2016 was $2,525,838 thousand, a decrease of $637,960 thousand, or 20%, from $3,163,798 thousand for the year ended December 31, 2015, primarily attributable to the associated costs related to declining North American locomotive deliveries and replacement parts.
Cost of services sold
Cost of services sold for the year ended December 31, 2016 was $909,116 thousand, a decrease of $22,629 thousand, or 2%, from $931,745 thousand for the year ended December 31, 2015, primarily attributable to lower costs associated with the disposal of the signaling business in November 2015.
Gross profit
Gross profit for the year ended December 31, 2016 was $1,171,637 thousand, a decrease of $154,299 thousand, or 12%, from $1,325,936 thousand for the year ended December 31, 2015. The decline in gross profit was primarily attributable to challenging market conditions in North America. Total gross margin remained at 25% from 2015. Gross margins on sales of goods fell to 17% in 2016, down from 21% in 2015. Gross margins on sales of services grew to 42% in 2016, up from 35% in 2015.
Selling, general and administrative expenses
Selling, general and administrative expenses for the year ended December 31, 2016 was $432,229 thousand, an increase of $17,741 thousand, or 4%, from $414,488 thousand for the year ended December 31, 2015, primarily attributable to an increase of restructuring costs.
Impairment of goodwill
Impairment of goodwill for the year ended December 31, 2016 was $2,027 thousand, a decrease of $83,394 thousand, or 98%, from $85,421 thousand for the year ended December 31, 2015. The suppression of the global commodities market and the resulting impact on the global mining investment environment led to a revision of expected cash flows for all reporting units in 2015, resulting in an impairment of goodwill. In 2016, the goodwill impairment for the Equipment segment was reversed due to a slight improvement in market conditions.
Non-operating benefit costs
Non-operating benefit costs for the year ended December 31, 2016 was $18,455 thousand, an increase of $2,206 thousand, or 14%, from $16,249 thousand for the year ended December 31, 2015, primarily due to a decrease in pension and severance costs offset by an increase in health benefits for retirees.