Note E — Intangible Assets

						June 2011												December 2010
		Weighted				Gross								Net				Net
		Average				Carrying				Accumulated				Carrying				Carrying
Dollars in thousands		Life				Amount				Amortization				Amount				Amount
Amortizable intangible assets:
Customer relationships		19years				$	452,179			$	123,599			$	328,580			$	337,307
License agreements		24years					180,214				56,436				123,778				127,741
Trademarks and other		9years					10,215				6,257				3,958				4,670
Amortizable intangible assets, net															456,316				469,718
Indefinite-lived intangible assets:
Trademarks and tradenames															1,099,201				1,021,207
Intangible assets, net														$	1,555,517			$	1,490,925

Intangible assets are amortized using the following methods: customer relationships — accelerated methods; license agreements — accelerated and straight-line methods; trademarks and other — straight-line method.

Indefinite-lived intangible assets increased from December 2010 due to the Rock and Republic trademarks acquisition in the first quarter of 2011 as discussed in Note C, and the impact of foreign currency translation.

Amortization of intangible assets for the second quarter and first six months of 2011 was $9.5 million and $19.2 million, respectively, and is expected to be $37.8 million for the year 2011. Estimated amortization expense for the years 2012 through 2015 is $34.6 million, $33.0 million, $31.9 million and $30.5 million, respectively.