Stockholders' Equity - Non-Vested Shares (Details)	6 Months Ended
	Jun. 30, 2016 $ / shares shares
Non-Vested Shares and Share Equivalents activity
Beginning Balance (in shares)	1,868,216
Granted (in shares)	433,790
Vested (in shares)	(772,220)
Forfeited (in shares)	(21,796)
Balance at the end of period (in shares)	1,507,990
Weighted Average Grant Date Fair Value (per share)
Balance at the beginning of period (in dollars per share) | $ / shares	$ 25.84
Granted (in dollars per share) | $ / shares	18.96
Vested (in dollars per share) | $ / shares	26.08
Forfeited (in dollars per share) | $ / shares	23.45
Balance at the end of period (in dollars per share) | $ / shares	$ 23.77
Starwood Property Trust, Inc. Equity Plan
Non-Vested Shares and Share Equivalents activity
Beginning Balance (in shares)	548,378
Granted (in shares)	430,014
Vested (in shares)	(261,420)
Forfeited (in shares)	(21,796)
Balance at the end of period (in shares)	695,176
Starwood Property Trust, Inc. Manager Equity Plan
Non-Vested Shares and Share Equivalents activity
Beginning Balance (in shares)	1,302,850
Vested (in shares)	(510,800)
Balance at the end of period (in shares)	792,050
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