Segment Data (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
Assets:
Cash and cash equivalents	$ 518,627		$ 317,627	$ 366,787		$ 177,671
Restricted cash	44,561		69,052
Loans held-for-investment, net	4,885,854		4,363,718
Loans held-for-sale	154,412		206,672
Loans transferred as secured borrowings	142,867		180,414
Investment securities	902,424		935,107
Intangible assets - servicing rights	156,846		177,173	190,646
Residential real estate, net			749,214
Non-performing residential loans			215,371
Investment in unconsolidated entities	118,621		122,954
Goodwill	140,437		140,437
Derivative assets	4,681		7,769
Accrued interest receivable	37,483		37,630
Other assets	165,532		95,813
VIE assets, at fair value	114,091,158		103,151,624
Total Assets	121,363,503		110,770,575
Liabilities:
Accounts payable, accrued expenses and other liabilities	140,809		225,374
Related-party payable	24,475		17,793
Dividends payable	108,012		90,171	76,900
Derivative liabilities	26,294		24,192
Secured financing agreements, net	2,561,267		2,257,560
Convertible senior notes, net	1,003,847		997,851
Secured borrowings on transferred loans	142,815		181,238
VIE liabilities, at fair value	113,541,151		102,649,263
Total Liabilities	117,548,670		106,443,442
Starwood Property Trust, Inc. Stockholders' Equity:
Preferred stock
Common stock	2,232		1,961
Additional paid-in capital	3,784,575		4,300,479
Treasury stock	(10,642)		(10,642)
Accumulated other comprehensive income	74,962	80,115	75,449	60,285	70,544	79,675
Retained earnings (deficit)	(49,686)		(84,719)
Total Starwood Property Trust, Inc. Stockholders' Equity	3,801,441		4,282,528
Non-controlling interests in consolidated subsidiaries	13,392		44,605
Total Equity	3,814,833		4,327,133	3,586,506		2,797,205
Total Liabilities and Equity	121,363,503		110,770,575
Operating segment
Assets:
Cash and cash equivalents	518,433		317,351
Restricted cash	44,561		69,052
Loans held-for-investment, net	4,885,854		4,363,718
Loans held-for-sale	154,412		206,672
Loans transferred as secured borrowings	142,867		180,414
Investment securities	1,371,945		1,344,429
Intangible assets - servicing rights	224,676		257,736
Residential real estate, net			749,214
Non-performing residential loans			215,371
Investment in unconsolidated entities	121,185		126,337
Goodwill	140,437		140,437
Derivative assets	4,681		7,769
Accrued interest receivable	37,483		37,630
Other assets	166,711		96,685
Total Assets	7,813,245		8,112,815
Liabilities:
Accounts payable, accrued expenses and other liabilities	140,444		225,065
Related-party payable	24,475		17,793
Dividends payable	108,012		90,171
Derivative liabilities	26,294		24,192
Secured financing agreements, net	2,561,267		2,257,560
Convertible senior notes, net	1,003,847		997,851
Secured borrowings on transferred loans	142,815		181,238
Total Liabilities	4,007,154		3,793,870
Starwood Property Trust, Inc. Stockholders' Equity:
Common stock	2,232		1,961
Additional paid-in capital	3,784,575		4,300,479
Treasury stock	(10,642)		(10,642)
Accumulated other comprehensive income	74,962		75,449
Retained earnings (deficit)	(49,686)		(84,719)
Total Starwood Property Trust, Inc. Stockholders' Equity	3,801,441		4,282,528
Non-controlling interests in consolidated subsidiaries	4,650		36,417
Total Equity	3,806,091		4,318,945
Total Liabilities and Equity	7,813,245		8,112,815
Operating segment | Real Estate Investment Lending
Assets:
Cash and cash equivalents	382,285		232,270
Restricted cash	34,324		36,593
Loans held-for-investment, net	4,881,439		4,350,937
Loans held-for-sale	8,750
Loans transferred as secured borrowings	142,867		180,414
Investment securities	733,876		794,147
Investment in unconsolidated entities	52,541		50,167
Derivative assets	2,321		3,138
Accrued interest receivable	36,904		35,501
Other assets	80,279		31,020
Total Assets	6,355,586		5,714,187
Liabilities:
Accounts payable, accrued expenses and other liabilities	50,540		66,127
Related-party payable	19,784		11,245
Dividends payable	108,012		90,171
Derivative liabilities	25,019		24,149
Secured financing agreements, net	2,465,699		2,127,717
Convertible senior notes, net	1,003,847		997,851
Secured borrowings on transferred loans	142,815		181,238
Total Liabilities	3,815,716		3,498,498
Starwood Property Trust, Inc. Stockholders' Equity:
Common stock	2,232		1,961
Additional paid-in capital	2,417,704		1,987,133
Treasury stock	(10,642)		(10,642)
Accumulated other comprehensive income	65,712		68,092
Retained earnings (deficit)	60,214		132,625
Total Starwood Property Trust, Inc. Stockholders' Equity	2,535,220		2,179,169
Non-controlling interests in consolidated subsidiaries	4,650		36,520
Total Equity	2,539,870		2,215,689
Total Liabilities and Equity	6,355,586		5,714,187
Operating segment | Single Family Residential
Assets:
Cash and cash equivalents			44,807
Restricted cash			251
Residential real estate, net			749,214
Non-performing residential loans			215,371
Other assets			8,045
Total Assets			1,017,688
Liabilities:
Accounts payable, accrued expenses and other liabilities			23,056
Total Liabilities			23,056
Starwood Property Trust, Inc. Stockholders' Equity:
Additional paid-in capital			1,004,846
Retained earnings (deficit)			(10,111)
Total Starwood Property Trust, Inc. Stockholders' Equity			994,735
Non-controlling interests in consolidated subsidiaries			(103)
Total Equity			994,632
Total Liabilities and Equity			1,017,688
Operating segment | LNR
Assets:
Cash and cash equivalents	136,148		40,274
Restricted cash	10,237		32,208
Loans held-for-investment, net	4,415		12,781
Loans held-for-sale	145,662		206,672
Investment securities	638,069		550,282
Intangible assets - servicing rights	224,676		257,736
Investment in unconsolidated entities	68,644		76,170
Goodwill	140,437		140,437
Derivative assets	2,360		4,631
Accrued interest receivable	579		2,129
Other assets	86,432		57,620
Total Assets	1,457,659		1,380,940
Liabilities:
Accounts payable, accrued expenses and other liabilities	89,904		135,882
Related-party payable	4,691		6,548
Derivative liabilities	1,275		43
Secured financing agreements, net	95,568		129,843
Total Liabilities	191,438		272,316
Starwood Property Trust, Inc. Stockholders' Equity:
Additional paid-in capital	1,366,871		1,308,500
Accumulated other comprehensive income	9,250		7,357
Retained earnings (deficit)	(109,900)		(207,233)
Total Starwood Property Trust, Inc. Stockholders' Equity	1,266,221		1,108,624
Total Equity	1,266,221		1,108,624
Total Liabilities and Equity	1,457,659		1,380,940
LNR VIEs
Assets:
Cash and cash equivalents	194		276
Investment securities	(469,521)		(409,322)
Intangible assets - servicing rights	(67,830)		(80,563)
Investment in unconsolidated entities	(2,564)		(3,383)
Other assets	(1,179)		(872)
VIE assets, at fair value	114,091,158		103,151,624
Total Assets	113,550,258		102,657,760
Liabilities:
Accounts payable, accrued expenses and other liabilities	365		309
VIE liabilities, at fair value	113,541,151		102,649,263
Total Liabilities	113,541,516		102,649,572
Starwood Property Trust, Inc. Stockholders' Equity:
Non-controlling interests in consolidated subsidiaries	8,742		8,188
Total Equity	8,742		8,188
Total Liabilities and Equity	$ 113,550,258		$ 102,657,760