Unaudited Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue:
Interest income	$ 48,624	$ 40,661	$ 147,571	$ 99,873
Gain on sales of loans	16,789	1,642	35,178	4,569
Other revenue	1,985	1,206	4,418	3,131
Gross revenue	67,398	43,509	187,167	107,573
Cost of revenue:
Provision for loan losses	16,239	17,359	54,865	47,011
Funding costs	5,126	4,090	14,941	12,531
Total cost of revenue	21,365	21,449	69,806	59,542
Net revenue	46,033	22,060	117,361	48,031
Operating expense:
Sales and marketing	15,847	8,325	43,503	21,799
Technology and analytics	11,111	4,649	29,904	11,357
Processing and servicing	3,352	2,235	9,070	5,928
General and administrative	12,146	6,142	31,722	13,968
Total operating expense	42,456	21,351	114,199	53,052
Income (loss) from operations	3,577	709	3,162	(5,021)
Other expense:
Interest expense	(70)	(55)	(250)	(274)
Warrant liability fair value adjustment	0	(300)	0	(9,122)
Total other expense	(70)	(355)	(250)	(9,396)
Income (loss) before provision for income taxes	3,507	354	2,912	(14,417)
Provision for income taxes	0	0	0	0
Net income (loss)	3,507	354	2,912	(14,417)
Accretion of dividends on redeemable convertible preferred stock	0	(3,628)	0	(9,828)
Net loss attributable to noncontrolling interest	226	0	458	0
Net income (loss) attributable to On Deck Capital, Inc. common stockholders	$ 3,733	$ (3,274)	$ 3,370	$ (24,245)
Net income (loss) per share attributable to On Deck Capital, Inc. common stockholders:
Basic (in dollars per share)	$ 0.05	$ (0.51)	$ 0.05	$ (4.43)
Diluted (in dollars per share)	$ 0.05	$ (0.51)	$ 0.04	$ (4.43)
Weighted-average common shares outstanding:
Basic (shares)	69,678,742	6,424,586	69,472,636	5,470,998
Diluted (shares)	75,125,740	6,424,586	75,414,348	5,470,998
Comprehensive income (loss):
Foreign currency translation adjustment	$ (1,215)	$ 0	$ (1,215)	$ 0
Comprehensive income (loss)	2,292	354	1,697	(14,417)
Comprehensive loss attributable to noncontrolling interests	546	0	546	0
Comprehensive income (loss) attributable to On Deck Capital, Inc. common stockholders	$ 3,064	$ 354	$ 2,701	$ (14,417)