XML 66 R54.htm IDEA: XBRL DOCUMENT v3.7.0.1
Fair Value (Narrative) (Details) - USD ($)
Mar. 31, 2017
Dec. 31, 2016
Fair Value [Line Items]    
Notes payable, principal amount outstanding $ 478,352,000 $ 486,812,000
Unsecured credit facility, principal amount outstanding 378,000,000 358,000,000
Contingent consideration obligations, fair value 4,500,000 5,640,000
Contingent consideration obligations, maximum payout 8,450,000  
Contingent consideration obligations, minimum payout 0  
Fixed Rate [Member]    
Fair Value [Line Items]    
Notes payable, principal amount outstanding 108,472,000 114,783,000
Variable Rate Debt, Subject To Interest Rate Swap [Member]    
Fair Value [Line Items]    
Notes payable, principal amount outstanding 328,643,000 330,425,000
Unsecured credit facility, principal amount outstanding 210,000,000 210,000,000
Variable Rate [Member]    
Fair Value [Line Items]    
Notes payable, principal amount outstanding 41,237,000 41,604,000
Unsecured credit facility, principal amount outstanding 168,000,000 148,000,000
Significant Other Observable Inputs (Level 2) [Member] | Estimated Fair Value [Member] | Fixed Rate [Member]    
Fair Value [Line Items]    
Notes payable, fair value disclosure 109,586,000 116,402,000
Significant Other Observable Inputs (Level 2) [Member] | Estimated Fair Value [Member] | Variable Rate Debt, Subject To Interest Rate Swap [Member]    
Fair Value [Line Items]    
Notes payable, fair value disclosure 326,393,000 328,512,000
Unsecured credit facility, fair value disclosure $ 204,591,000 $ 203,055,000