|
Debt (Details) (USD $)
|
3 Months Ended |
|
Mar. 31, 2015
|
| Revolving Credit Facility [Member] |
|
| Line of Credit Facility [Line Items] |
|
| Revolving line of credit borrowing capacity |
$ 125,000,000.0 |
| Additional borrowing capacity under revolving line of credit facility |
25,000,000.0 |
| Amount provided by credit agreement |
75,000,000 |
| Remaining amount available under revolving line of credit facility |
49,700,000 |
| Percentage of unused commitment fee, per annum |
0.25% |
| Revolving line of credit interest rate, per annum |
0.9375% |
| Revolving Credit Facility [Member] | LIBOR [Member] | Minimum [Member] |
|
| Line of Credit Facility [Line Items] |
|
| Variable interest rate, percentage in addition to base rate |
0.75% |
| Revolving Credit Facility [Member] | LIBOR [Member] | Maximum [Member] |
|
| Line of Credit Facility [Line Items] |
|
| Variable interest rate, percentage in addition to base rate |
1.75% |
| Revolving Credit Facility [Member] | Prime Rate [Member] | Minimum [Member] |
|
| Line of Credit Facility [Line Items] |
|
| Variable interest rate, percentage in addition to base rate |
0.00% |
| Revolving Credit Facility [Member] | Prime Rate [Member] | Maximum [Member] |
|
| Line of Credit Facility [Line Items] |
|
| Variable interest rate, percentage in addition to base rate |
0.75% |
| Letters of Credit [Member] |
|
| Line of Credit Facility [Line Items] |
|
| Amount provided by credit agreement |
$ 300,000 |