|
Fair Value Measurements Fair Value, Assets and Liabilities Measured at Fair Value (Details) (USD $)
In Thousands, unless otherwise specified
|
Jun. 30, 2014
|
Dec. 31, 2013
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-Sale Securities |
$ 7,174 |
$ 3,174 |
|
Fair Value, Measurements, Recurring [Member] | Fair Value [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash and Cash Equivalents, Fair Value Disclosure |
500,558 |
585,514 |
| Contingent Consideration, Fair Value Disclosure |
4,006 |
606 |
|
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash and Cash Equivalents, Fair Value Disclosure |
500,558 |
585,514 |
| Contingent Consideration, Fair Value Disclosure |
0 |
0 |
|
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash and Cash Equivalents, Fair Value Disclosure |
0 |
0 |
| Contingent Consideration, Fair Value Disclosure |
0 |
0 |
|
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash and Cash Equivalents, Fair Value Disclosure |
0 |
0 |
| Contingent Consideration, Fair Value Disclosure |
4,006 |
606 |
|
Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-Sale Securities |
2,630 |
3,174 |
|
Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-Sale Securities |
0 |
0 |
|
Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-Sale Securities |
0 |
0 |
|
Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-Sale Securities |
2,630 |
3,174 |
|
Redeemable Preferred Stock [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-Sale Securities |
4,544 |
0 |
|
Redeemable Preferred Stock [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-Sale Securities |
0 |
0 |
|
Redeemable Preferred Stock [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-Sale Securities |
0 |
0 |
|
Redeemable Preferred Stock [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-Sale Securities |
$ 4,544 |
$ 0 |