Stockholders' Equity - Non-Vested Shares (Details) - $ / shares	1 Months Ended	3 Months Ended
	May. 31, 2015	Mar. 31, 2016
Non-Vested Shares and Share Equivalents activity
Beginning Balance (in shares)		1,868,216
Granted (in shares)		343,582
Vested (in shares)		(503,180)
Forfeited (in shares)		(15,684)
Balance at the end of period (in shares)		1,692,934
Weighted Average Grant Date Fair Value (per share)
Balance at the beginning of period (in dollars per share)		$ 25.84
Granted (in dollars per share)		18.72
Vested (in dollars per share)		25.55
Forfeited (in dollars per share)		24.17
Balance at the end of period (in dollars per share)		$ 24.49
Award vesting period	3 years
Starwood Property Trust, Inc. Equity Plan
Non-Vested Shares and Share Equivalents activity
Beginning Balance (in shares)		548,378
Granted (in shares)		339,806
Vested (in shares)		(247,780)
Forfeited (in shares)		(15,684)
Balance at the end of period (in shares)		624,720
Starwood Property Trust, Inc. Manager Equity Plan
Non-Vested Shares and Share Equivalents activity
Beginning Balance (in shares)		1,302,850
Vested (in shares)		(255,400)
Balance at the end of period (in shares)		1,047,450
Starwood Property Trust, Inc. Non-Executive Director Stock Plan
Non-Vested Shares and Share Equivalents activity
Beginning Balance (in shares)		16,988
Granted (in shares)		3,776
Balance at the end of period (in shares)		20,764