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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract] |
Schedule Of Roll Forward Activity In Insurance Reserves [Table Text Block] | While recorded accruals are based on the ultimate liability, which includes amounts in excess of the deductible, a corresponding receivable for amounts in excess of the stop loss deductible is included in current assets in the consolidated balance sheets at December 31:
(in thousands) |  | 2015 |  | 2014 |  | 2013
Balance at beginning of period |  | $ | 39,480 |  |  | $ | 39,111 |  |  | $ | 39,583 |
Net increases in reserves |  |  | 15,686 |  |  |  | 16,220 |  |  |  | 16,861 |
Net payments made |  |  | (18,199 | ) |  |  | (15,851 | ) |  |  | (17,333 | )
Balance at end of period |  | $ | 36,967 |  |  | $ | 39,480 |  |  | $ | 39,111 |

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