8. Properties

Properties and related accumulated depreciation are as follows (in millions):

	December 31,

	2012		2011
Land	$	69.8	$	72.3
Buildings		350.7		357.1
Data processing equipment		207.6		192.3
Data processing software		529.5		506.6
Furniture, fixtures and other equipment		425.0		403.3
Leasehold improvements		85.9		83.0
Construction-in-progress		32.8		44.0

		1,701.3		1,658.6
Less accumulated depreciation and amortization		1,226.3		1,134.7

Net properties	$	475.0	$	523.9

At December 31, 2012 and 2011, there were approximately $7.5 million and $7.8 million of net properties, respectively, which are included in the above table, under lease with a municipality. At December 31, 2012 and 2011, there was approximately $3.1 million and $4.1 million, respectively, of assets (primarily buildings) under capital lease, net of accumulated depreciation, included in the above table. Depreciation expense for the years ended December 31, 2012, 2011 and 2010, was $139.1 million, $121.1 million and $127.5 million, respectively.

Included in data processing software is $71.1 million of proprietary software acquired in business combinations, including $45.1 million, in aggregate, acquired in the 2011 and 2010 acquisitions described above. At December 31, 2012 and 2011, the net book value of this acquired software was $31.3 million and $39.5 million, respectively.

The following table summarizes software development and maintenance costs for the Company's proprietary systems and software products, which include capitalized software development costs (in millions):

	Year Ended December 31,

	2012		2011		2010
Capitalized software development costs	$	30.9	$	31.4	$	27.8

Amortization of capitalized software development costs	$	28.7	$	26.8	$	26.4

Non-capitalizable software development and maintenance costs	$	128.7	$	131.2	$	134.3

Non-capitalizable software development and maintenance expense is included in Costs and expenses in the Consolidated Statement of Income.