Summary of Significant Accounting Policies - (Details) $ / shares in Units, $ in Thousands					12 Months Ended
	Dec. 17, 2015 USD ($) shares	Mar. 01, 2015 USD ($)	Feb. 05, 2015 USD ($) shares	Jul. 24, 2013 USD ($) properties states shares	Dec. 31, 2015 USD ($) properties $ / shares shares	Dec. 31, 2014 USD ($) properties shares	Dec. 31, 2013 USD ($) properties shares	Oct. 19, 2015 shares	Jan. 21, 2015 shares
Business Acquisition [Line Items]
Ownership interest in consolidated subsidiaries (as a percent)					100.00%
Number of medical office buildings | properties				19
Number of partnership units issued | shares				2,744,000				15,812,500	18,975,000
Principal payments on mortgage debt					$ 2,022	$ 6,549	$ 41,832
Acquisition price					$ 840,958	543,436
Percentage of interest held				79.60%	95.70%
Conversion ratio					1
Value of Preferred Units			$ 9,700	$ 31,600
Embedded derivatives					$ 8,149	$ 0
Minnetonka MOB
Business Acquisition [Line Items]
Number of units issued for funding purchase price (in shares) | shares			44,685
Acquisition price			$ 26,000
Cumulative preferred return		15.00%
Equity investment		$ 5,000
Internal rate of return		15.00%
Nashville MOB
Business Acquisition [Line Items]
Number of units issued for funding purchase price (in shares) | shares	91,236
Acquisition price	$ 45,440
Value of Preferred Units	$ 19,700
Series A Preferred units
Business Acquisition [Line Items]
Cumulative preferred return					5.00%
Shares issued upon conversion					1
Redemption value per share | $ / shares					$ 200
Period of time before redeemable					1 year
Operating Partnership | Ziegler Funds Property Interests
Business Acquisition [Line Items]
Number of medical office buildings | properties				19
Number of states | states				10
Number of partnership units issued | shares				2,744,000
Principal payments on mortgage debt				$ 36,900
Operating Partnership | Units
Business Acquisition [Line Items]
Number of additional acquisitions | properties					3	5	1
Number of units issued for funding purchase price (in shares) | shares					648,649	2,042,313	954,877
Value of units issued for funding purchase price					$ 11,000	$ 28,600	$ 11,500
Acquisition price					$ 32,500	$ 103,600	$ 37,500
Operating Partnership | Series A Preferred units | Units | Minnetonka MOB
Business Acquisition [Line Items]
Number of units issued for funding purchase price (in shares) | shares			44,685
Operating Partnership | Series A Preferred units | Units | Nashville MOB
Business Acquisition [Line Items]
Number of units issued for funding purchase price (in shares) | shares	91,236
Value of units issued for funding purchase price	$ 19,700