5. PROPERTY, PLANT AND EQUIPMENT, NET 6. INTANGIBLES, NET 7. GOODWILL The components of property, plant and equipment, net were as follows at December 31, 2013 and 2012 (in thousands): The components of intangibles, net as of December 31, 2013 and 2012 are as follows (in thousands): Our estimated amortization expense relating to these intangibles for the next five years is summarized in the following table (in  thousands): The changes in the carrying amount of goodwill for each reportable segment for the years ended December 31, 2013, and 2012 were  as follows (in thousands): 2013 2012 Land $ 7,475 $ 6,791 Building and leasehold improvements 100,990 91,593 Machinery and equipment 228,683 213,095 Total property, plant and equipment 337,148 311,479 Less - accumulated depreciation and amortization (198,324) (186,061) Property, plant and equipment, net $ 138,824 $ 125,418 2013 2012 Original life in years Gross  Carrying  Value Accumulated  Amortization Gross  Carrying  Value Accumulated  Amortization Acquired trade secrets 2-20 $ 1,388 $ 775 $ 1,518 $ 992 Acquired patents and trademarks 4-10 6,367 1,181 4,435 1,807 Agreements not to compete 3-5 3,286 2,616 3,286 2,158 Acquired trade names Indefinite 4,480 — 4,439 — Total intangibles $ 15,521 $ 4,572 $ 13,678 $ 4,957 2014 $ 1,713 2015 $ 1,078 2016 $ 1,021 2017 $ 628 2018 $ 434 Reservoir  Description Production  Enhancement Reservoir  Management Total Balance at December 31, 2011 $ 80,932 $ 79,010 $ 2,845 $ 162,787 Goodwill acquired during the year — 550 — 550 Balance at December 31, 2012 80,932 79,560 2,845 163,337 Goodwill acquired during the year — — — — Balance at December 31, 2013 $ 80,932 $ 79,560 $   2,845 $ 163,337  46