Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 368,270	$ 376,727
Accounts receivable, net of allowances of $37.0 million and $28.6 million at June 30, 2014 and December 31, 2013, respectively	120,117	101,587
Inventory	86,309	87,105
Deferred tax assets	13,430	13,431
Prepaid expenses and other current assets	14,967	12,591
Total current assets	603,093	591,441
Fixed assets, net	41,951	39,268
Intangible assets, net	900,725	836,273
Goodwill	284,822	257,694
Restricted cash	1,496	1,574
Other assets	15,023	15,032
Total assets	1,847,110	1,741,282
Current liabilities:
Accounts payable	8,258	26,911
Accrued expenses	167,229	142,290
Deferred revenue	3,606	5,052
Total current liabilities	179,093	174,253
Contingent purchase price	360,780	302,363
Deferred tax liabilities	149,250	128,677
Convertible senior notes (due 2017)	241,304	236,088
Other liabilities	6,421	7,740
Total liabilities	936,848	849,121
Stockholders' equity:
Preferred stock, $1.00 par value per share, 5,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.001 par value per share, 125,000,000 shares authorized; 67,316,487 issued and 65,123,505 outstanding at June 30, 2014 and 66,590,875 issued and 64,397,893 outstanding at December 31, 2013, respectively	67	66
Additional paid-in capital	1,019,477	991,982
Treasury stock, at cost; 2,192,982 shares at June 30, 2014 and December 31, 2013, respectively	(50,000)	(50,000)
Accumulated deficit	(55,052)	(44,899)
Accumulated other comprehensive loss	(3,867)	(4,652)
Total The Medicines Company stockholders' equity	910,625	892,497
Non-controlling interest in joint venture	(363)	(336)
Total stockholders' equity	910,262	892,161
Total liabilities and stockholders' equity	$ 1,847,110	$ 1,741,282