Fair Value Disclosures - Fair value Hierarchy (Details) (USD $) | Jun. 30, 2014 | Dec. 31, 2013 |
In Thousands, unless otherwise specified |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Available-for-sale securities | $445 | | $8,528 |
Trading securities | 9,661 | | 7,708 |
Derivative contracts | 94,327 | | 0 |
Contingent and deferred consideration | 48,889 | | 2,180 |
Fair Value, Measurements, Recurring | Level 1 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Available-for-sale securities | 445 | | 8,528 |
Trading securities | 9,579 | | 7,708 |
Deferred compensation plan investments: | 79,611 | | ' |
Total | 164,343 | | 16,236 |
Contingent consideration | 0 | | 0 |
Total | 438 | | 309 |
Fair Value, Measurements, Recurring | Level 2 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Available-for-sale securities | 0 | | 0 |
Trading securities | 81 | | 0 |
Deferred compensation plan investments: | 0 | | ' |
Total | 6,080 | | 0 |
Contingent consideration | 0 | | 0 |
Total | 0 | | 0 |
Fair Value, Measurements, Recurring | Level 3 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Available-for-sale securities | 0 | | 0 |
Trading securities | 1 | | 0 |
Deferred compensation plan investments: | 0 | | ' |
Total | 121 | | 0 |
Contingent and deferred consideration | ' | | 2,180 |
Total | 135,373 | | 2,180 |
Fair Value, Measurements, Recurring | Total | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Available-for-sale securities | 445 | | 8,528 |
Trading securities | 9,661 | | 7,708 |
Deferred compensation plan investments: | 79,611 | | ' |
Total | 170,544 | | 16,236 |
Contingent consideration | 31,211 | | 2,180 |
Total | 135,811 | | 2,489 |
Money market fund | Fair Value, Measurements, Recurring | Level 1 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Cash equivalents - money market funds | 74,708 | | ' |
Deferred compensation plan investments: | 4,084 | | ' |
Money market fund | Fair Value, Measurements, Recurring | Level 2 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Cash equivalents - money market funds | 0 | | ' |
Deferred compensation plan investments: | 0 | | ' |
Money market fund | Fair Value, Measurements, Recurring | Level 3 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Cash equivalents - money market funds | 0 | | ' |
Deferred compensation plan investments: | 0 | | ' |
Money market fund | Fair Value, Measurements, Recurring | Total | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Cash equivalents - money market funds | 74,708 | | ' |
Deferred compensation plan investments: | 4,084 | | ' |
U.S. treasury securities | Fair Value, Measurements, Recurring | Level 1 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
U.S. treasury securities | 0 | | ' |
U.S. treasury securities | Fair Value, Measurements, Recurring | Level 2 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
U.S. treasury securities | 5,999 | | ' |
U.S. treasury securities | Fair Value, Measurements, Recurring | Level 3 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
U.S. treasury securities | 0 | | ' |
U.S. treasury securities | Fair Value, Measurements, Recurring | Total | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
U.S. treasury securities | 5,999 | | ' |
Mutual funds | Fair Value, Measurements, Recurring | Level 1 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Available-for-sale securities | 445 | | 8,528 |
Trading securities | 9,100 | | 7,708 |
Mutual funds | Fair Value, Measurements, Recurring | Level 2 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Available-for-sale securities | 0 | | 0 |
Trading securities | 0 | | 0 |
Mutual funds | Fair Value, Measurements, Recurring | Level 3 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Available-for-sale securities | 0 | | 0 |
Trading securities | 0 | | 0 |
Mutual funds | Fair Value, Measurements, Recurring | Total | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Available-for-sale securities | 445 | | 8,528 |
Trading securities | 9,100 | | 7,708 |
Equity securities | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Available-for-sale securities | 445 | | 8,528 |
Equity securities | Fair Value, Measurements, Recurring | Level 1 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 321 | | ' |
Other liabilities: | 263 | | 238 |
Equity securities | Fair Value, Measurements, Recurring | Level 2 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 0 | | ' |
Other liabilities: | 0 | | 0 |
Equity securities | Fair Value, Measurements, Recurring | Level 3 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 1 | | ' |
Other liabilities: | 0 | | 0 |
Equity securities | Fair Value, Measurements, Recurring | Total | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 322 | | ' |
Other liabilities: | 263 | | 238 |
Certificate of deposits | Fair Value, Measurements, Recurring | Level 1 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 50 | | ' |
Other liabilities: | 59 | | 20 |
Certificate of deposits | Fair Value, Measurements, Recurring | Level 2 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 10 | | ' |
Other liabilities: | 0 | | 0 |
Certificate of deposits | Fair Value, Measurements, Recurring | Level 3 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 0 | | ' |
Other liabilities: | 0 | | 0 |
Certificate of deposits | Fair Value, Measurements, Recurring | Total | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 60 | | ' |
Other liabilities: | 59 | | 20 |
U.S. government bonds | Fair Value, Measurements, Recurring | Level 1 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 0 | | ' |
U.S. government bonds | Fair Value, Measurements, Recurring | Level 2 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 11 | | ' |
U.S. government bonds | Fair Value, Measurements, Recurring | Level 3 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 0 | | ' |
U.S. government bonds | Fair Value, Measurements, Recurring | Total | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 11 | | ' |
State and municipal bonds | Fair Value, Measurements, Recurring | Level 1 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 108 | | ' |
Other liabilities: | 49 | | 51 |
State and municipal bonds | Fair Value, Measurements, Recurring | Level 2 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 0 | | ' |
Other liabilities: | 0 | | 0 |
State and municipal bonds | Fair Value, Measurements, Recurring | Level 3 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 0 | | ' |
Other liabilities: | 0 | | 0 |
State and municipal bonds | Fair Value, Measurements, Recurring | Total | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 108 | | ' |
Other liabilities: | 49 | | 51 |
Other | Fair Value, Measurements, Recurring | Level 1 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 0 | | ' |
Other | Fair Value, Measurements, Recurring | Level 2 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 60 | | ' |
Other | Fair Value, Measurements, Recurring | Level 3 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 0 | | ' |
Other | Fair Value, Measurements, Recurring | Total | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Trading securities | 60 | | ' |
International global funds | Fair Value, Measurements, Recurring | Level 1 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Deferred compensation plan investments: | 16,392 | | ' |
International global funds | Fair Value, Measurements, Recurring | Level 2 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Deferred compensation plan investments: | 0 | | ' |
International global funds | Fair Value, Measurements, Recurring | Level 3 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Deferred compensation plan investments: | 0 | | ' |
International global funds | Fair Value, Measurements, Recurring | Total | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Deferred compensation plan investments: | 16,392 | | ' |
U.S. equity funds | Fair Value, Measurements, Recurring | Level 1 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Deferred compensation plan investments: | 47,494 | | ' |
U.S. equity funds | Fair Value, Measurements, Recurring | Level 2 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Deferred compensation plan investments: | 0 | | ' |
U.S. equity funds | Fair Value, Measurements, Recurring | Level 3 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Deferred compensation plan investments: | 0 | | ' |
U.S. equity funds | Fair Value, Measurements, Recurring | Total | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Deferred compensation plan investments: | 47,494 | | ' |
U.S. fixed-income funds | Fair Value, Measurements, Recurring | Level 1 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Deferred compensation plan investments: | 11,641 | | ' |
U.S. fixed-income funds | Fair Value, Measurements, Recurring | Level 2 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Deferred compensation plan investments: | 0 | | ' |
U.S. fixed-income funds | Fair Value, Measurements, Recurring | Level 3 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Deferred compensation plan investments: | 0 | | ' |
U.S. fixed-income funds | Fair Value, Measurements, Recurring | Total | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Deferred compensation plan investments: | 11,641 | | ' |
Other assets - private equity | Fair Value, Measurements, Recurring | Level 1 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Other assets - private equity | 0 | | ' |
Other assets - private equity | Fair Value, Measurements, Recurring | Level 2 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Other assets - private equity | 0 | | ' |
Other assets - private equity | Fair Value, Measurements, Recurring | Level 3 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Other assets - private equity | 120 | | ' |
Other assets - private equity | Fair Value, Measurements, Recurring | Total | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Other assets - private equity | 120 | | ' |
Derivative contracts | Fair Value, Measurements, Recurring | Level 1 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Derivative contracts | 0 | | ' |
Derivative contracts | Fair Value, Measurements, Recurring | Level 2 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Derivative contracts | 0 | | ' |
Derivative contracts | Fair Value, Measurements, Recurring | Total | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Derivative contracts | 104,162 | | ' |
Mutual funds and UITs | Fair Value, Measurements, Recurring | Level 1 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Other liabilities: | 67 | | ' |
Mutual funds and UITs | Fair Value, Measurements, Recurring | Level 2 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Other liabilities: | 0 | | ' |
Mutual funds and UITs | Fair Value, Measurements, Recurring | Level 3 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Other liabilities: | 0 | | ' |
Mutual funds and UITs | Fair Value, Measurements, Recurring | Total | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Other liabilities: | 67 | | ' |
Long-term Debt | Derivative contracts | Fair Value, Measurements, Recurring | Level 3 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Derivative contracts | 9,800 | [1] | ' |
Monte Carlo | Derivative contracts | Fair Value, Measurements, Recurring | Level 3 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Derivative contracts | 104,162 | [1] | ' |
Discounted cash flow | Fair Value, Measurements, Recurring | Level 3 | ' | | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | | ' |
Contingent consideration | $31,211 | | ' |
|
[1] | Includes $9.8 million of derivatives classified in long-term debt. |