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Fair Value Measurements - Fair Value Measurements Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Change in Fair Value of Earnout Liabilities	$ 1,936	$ 1,000
Accretion Related To Earnouts		$ 0
Provider Earnout
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accretion Related To Earnouts	100
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent payment arrangement, beginning	22,653
Contingent payment arrangement, ending	16,186
Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent payment arrangement, beginning	22,653
Purchase price contingent consideration	0
Change in Fair Value of Earnout Liabilities	711
Accretion Related To Earnouts	1,225
Business Combination, Contingent Consideration Arrangements, Settlement	(8,403)
Contingent payment arrangement, ending	16,186
Fair Value, Measurements, Recurring | Level 3 | Major Earnout And Stock Earnout [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent payment arrangement, beginning	17,760
Purchase price contingent consideration	0
Change in Fair Value of Earnout Liabilities	711
Accretion Related To Earnouts	1,167
Business Combination, Contingent Consideration Arrangements, Settlement	(7,403)
Contingent payment arrangement, ending	12,235
Fair Value, Measurements, Recurring | Level 3 | Provider Earnout
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent payment arrangement, beginning	4,893
Purchase price contingent consideration	0
Change in Fair Value of Earnout Liabilities	0
Accretion Related To Earnouts	58
Business Combination, Contingent Consideration Arrangements, Settlement	$ (1,000)

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Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 4
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-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Section 50
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