10.	Investments in Unconsolidated Subsidiaries

Investments in unconsolidated subsidiaries are accounted for under the equity method of accounting. Our investment ownership percentages in equity method investments vary, generally ranging up to 5.0% in our Global Investment Management segment, up to 10.0% in our Development Services segment, and up to 50.0% in our other business segments.

Combined condensed financial information for the entities accounted for using the equity method is as follows (dollars in thousands):

Condensed Balance Sheets Information:

	December 31,
		2017		2016
Global Investment Management
Current assets	$	1,304,249	$	1,787,277
Non-current assets		15,369,496		13,711,080
Total assets	$	16,673,745	$	15,498,357
Current liabilities	$	526,777	$	1,237,589
Non-current liabilities		4,354,825		4,402,376
Total liabilities	$	4,881,602	$	5,639,965
Non-controlling interests	$	83,579	$	31,265
Development Services
Current assets	$	2,995,449	$	2,717,146
Non-current assets		102,508		122,457
Total assets	$	3,097,957	$	2,839,603
Current liabilities	$	1,451,239	$	1,153,833
Non-current liabilities		110,649		167,757
Total liabilities	$	1,561,888	$	1,321,590
Other
Current assets	$	86,171	$	69,466
Non-current assets		76,577		38,318
Total assets	$	162,748	$	107,784
Current liabilities	$	54,211	$	46,623
Non-current liabilities		1,340		1,668
Total liabilities	$	55,551	$	48,291
Total
Current assets	$	4,385,869	$	4,573,889
Non-current assets		15,548,581		13,871,855
Total assets	$	19,934,450	$	18,445,744
Current liabilities	$	2,032,227	$	2,438,045
Non-current liabilities		4,466,814		4,571,801
Total liabilities	$	6,499,041	$	7,009,846
Non-controlling interests	$	83,579	$	31,265

Condensed Statements of Operations Information:

	Year Ended December 31,
		2017		2016		2015
Global Investment Management
Revenue	$	1,108,125	$	1,184,573	$	585,495
Operating income (loss)	$	972,493	$	209,230	$	(414,538	)
Net income (loss)	$	833,189	$	122,560	$	(481,405	)
Development Services
Revenue	$	104,816	$	85,594	$	62,191
Operating income	$	427,407	$	292,141	$	251,557
Net income	$	395,697	$	269,841	$	240,034
Other
Revenue	$	179,649	$	156,035	$	169,078
Operating income	$	25,924	$	26,500	$	30,566
Net income	$	25,459	$	26,350	$	31,050
Total
Revenue	$	1,392,590	$	1,426,202	$	816,764
Operating income (loss)	$	1,425,824	$	527,871	$	(132,415	)
Net income (loss)	$	1,254,345	$	418,751	$	(210,321	)

Our Global Investment Management segment invests our own capital in certain real estate investments with clients. We have provided investment management, property management, brokerage and other professional services in connection with these real estate investments on an arm’s length basis and earned revenues from these unconsolidated subsidiaries of $100.3 million, $86.8 million and $98.1 million during the years ended December 31, 2017, 2016 and 2015, respectively.