| in € thousand; annex to the condensed notes | ||||||||||||||||||||||
| 
 | Parent company | Parent company interests | Non-controlling interests | Total subgroup consolidated equity | ||||||||||||||||||
| 
 | 
 | 
 | 
 | Other comprehensive income | 
 | 
 | 
 | |||||||||||||||
| 
 | Subscribed capital | Capital reserve | Retained consolidated earnings | Reserve for foreign currency translation | Cash flow hedges | Actuarial gains/losses | Deferred taxes on changes recognised directly in equity | Other | 
 | 
 | 
 | |||||||||||
| Balance as of 31. December 2016 | 70,048 | 141,078 | 396,191 | - 64,595 | 412 | - 85,645 | 27,620 | 11,507 | 496,616 | 32,094 | 528,710 | |||||||||||
| Dividends | 
 | 
 | - 41,329 | 
 | 
 | 
 | 
 | 
 | - 41,329 | 
 | - 41,329 | |||||||||||
| Total comprehensive income subgroup | 
 | 
 | 48,050 | - 1,608 | - 41 | 14,136 | - 4,594 | 53 | 55,996 | 17,650 | 73,646 | |||||||||||
| Balance as of 30. June 2017 | 70,048 | 141,078 | 402,912 | - 66,203 | 371 | - 71,509 | 23,026 | 11,560 | 511,284 | 49,744 | 561,028 | |||||||||||
| 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | |||||||||||
| Balance as of 31. December 2017 | 70,048 | 141,078 | 426,068 | - 70,041 | 405 | - 79,867 | 25,690 | 11,633 | 525,014 | 30,790 | 555,803 | |||||||||||
| Adjustment due to first-time adoption of IFRS 9 | 
 | 
 | 70 | 
 | 
 | 
 | 
 | 
 | 70 | 34 | 103 | |||||||||||
| Balance as of 1. January 2018 | 70,048 | 141,078 | 426,138 | - 70,041 | 405 | - 79,867 | 25,690 | 11,633 | 525,084 | 30,823 | 555,907 | |||||||||||
| Dividends | 
 | 
 | - 46,933 | 
 | 
 | 
 | 
 | 
 | - 46,933 | 
 | - 46,933 | |||||||||||
| Acquisition of non-controlling interests in consolidated companies | 
 | 
 | - 17,311 | 
 | 
 | 
 | 
 | 
 | - 17,311 | - 32,597 | - 49,908 | |||||||||||
| Deconsolidation of interests in related parties | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 0 | - 342 | - 342 | |||||||||||
| Total comprehensive income subgroup | 
 | 
 | 47,298 | 2,748 | 22 | 1,596 | - 505 | - 88 | 51,071 | 16,445 | 67,516 | |||||||||||
| Other changes | 
 | 
 | - 101 | 14 | 
 | 
 | 
 | 
 | - 87 | - 110 | - 197 | |||||||||||
| Balance as of 30. June 2018 | 70,048 | 141,078 | 409,091 | - 67,279 | 427 | - 78,271 | 25,185 | 11,545 | 511,824 | 14,219 | 526,043 | |||||||||||