Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 4,772	$ 2,998	$ 9,244	$ 5,333
Segment Reporting Information, Net Assets	472,128		472,128		441,819
Revenues	93,686	75,384	180,796	139,527
Cost of Revenue	44,318	36,008	86,061	64,402
Gross profit	49,368	39,376	94,735	75,125
Gross Margin Percentage	52.70%	52.20%	52.40%	53.80%
Operating Expenses	40,009	36,945	81,208	69,059
Income from operations	9,359	2,431	13,527	6,066
Operating margin percentage	10.00%	3.20%	7.50%	4.30%
Interest and other income (expense), net	63	(73)	(159)	23
Income before provision for income taxes	9,422	2,358	13,368	6,089
Provision for income taxes	3,406	983	3,967	2,363
Net income	6,016	1,375	9,401	3,726
Segment Reporting Information, Expenditures for Additions to Long-Lived Assets	2,413	2,649	5,751	4,087
Acute Care Solutions [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	2,804	2,131	5,546	4,466
Segment Reporting Information, Net Assets	256,858		256,858		235,186
Revenues	68,112	64,309	134,110	126,900
Cost of Revenue	29,819	28,249	59,122	55,938
Gross profit	38,293	36,060	74,988	70,962
Gross Margin Percentage	56.20%	56.10%	55.90%	55.90%
Operating Expenses	31,206	33,249	63,140	65,098
Income from operations	7,087	2,811	11,848	5,864
Operating margin percentage	10.40%	4.40%	8.80%	4.60%
Segment Reporting Information, Expenditures for Additions to Long-Lived Assets	1,018	2,569	2,018	4,007
Non-acute care solutions [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	1,968	867	3,698	867
Segment Reporting Information, Net Assets	215,270		215,270		206,633
Revenues	25,574	11,075	46,686	12,627
Cost of Revenue	14,499	7,759	26,939	8,464
Gross profit	11,075	3,316	19,747	4,163
Gross Margin Percentage	43.30%	29.90%	42.30%	33.00%
Operating Expenses	8,803	3,696	18,068	3,961
Income from operations	2,272	(380)	1,679	202
Operating margin percentage	8.90%	(16.70%)	3.60%	(16.70%)
Segment Reporting Information, Expenditures for Additions to Long-Lived Assets	$ 1,395	$ 80	$ 3,733	$ 80