Information Concerning Guarantor and Non-Guarantor Subsidiaries - Condensed Consolidating Statement of Cash Flows (Detail) (USD $) | 6 Months Ended |
In Thousands, unless otherwise specified | Jun. 30, 2014 | Jun. 30, 2013 |
Condensed Financial Statements, Captions [Line Items] | ' | ' |
Net cash provided by (used in) continuing operating activities | $91,914 | ($8,987) |
Net cash provided by (used in) discontinued operating activities | -205 | 79 |
Net cash provided by (used in) operating activities | 91,709 | -8,908 |
Purchases of property and equipment | -35,773 | -15,181 |
Increase in restricted cash and cash equivalents | 6,268 | -8,273 |
Other investing activities | 398 | 226 |
Net cash used in investing activities - continuing operations | -29,107 | -23,228 |
Net cash used in investing activities - discontinued operations | ' | ' |
Net cash used in investing activities | -29,107 | -23,228 |
Net borrowings (repayments) under credit facility | 190,500 | -82,000 |
Issuance of senior notes | ' | 350,000 |
Repurchase and conversion of convertible notes | -126,541 | ' |
Early redemption of senior notes | ' | -152,180 |
Repurchase of common stock warrants | -50,775 | ' |
Deferred financing costs paid | -8,158 | -15,395 |
Repurchase of Company stock for retirement | ' | -100,028 |
Payment of dividend | -53,389 | -25,823 |
Proceeds from exercise of stock option and purchase plans | 2,309 | 5,145 |
Excess tax benefit from stock-based compensation | 12 | 4 |
Other financing activities, net | -296 | -357 |
Net cash provided by (used in) financing activities - continuing operations | -46,338 | -20,634 |
Net cash used in financing activities - discontinued operations | ' | ' |
Net cash provided by (used in) financing activities | -46,338 | -20,634 |
Net change in cash and cash equivalents | 16,264 | -52,770 |
Cash and cash equivalents - unrestricted, beginning of period | 61,579 | 97,170 |
Cash and cash equivalents - unrestricted, end of period | 77,843 | 44,400 |
Eliminations [Member] | ' | ' |
Condensed Financial Statements, Captions [Line Items] | ' | ' |
Net cash provided by (used in) continuing operating activities | ' | ' |
Net cash provided by (used in) discontinued operating activities | ' | ' |
Net cash provided by (used in) operating activities | ' | ' |
Purchases of property and equipment | ' | ' |
Increase in restricted cash and cash equivalents | ' | ' |
Other investing activities | ' | ' |
Net cash used in investing activities - continuing operations | ' | ' |
Net cash used in investing activities - discontinued operations | ' | ' |
Net cash used in investing activities | ' | ' |
Net borrowings (repayments) under credit facility | ' | ' |
Issuance of senior notes | ' | ' |
Repurchase and conversion of convertible notes | ' | ' |
Early redemption of senior notes | ' | ' |
Repurchase of common stock warrants | ' | ' |
Deferred financing costs paid | ' | ' |
Repurchase of Company stock for retirement | ' | ' |
Payment of dividend | ' | ' |
Proceeds from exercise of stock option and purchase plans | ' | ' |
Excess tax benefit from stock-based compensation | ' | ' |
Other financing activities, net | ' | ' |
Net cash provided by (used in) financing activities - continuing operations | ' | ' |
Net cash used in financing activities - discontinued operations | ' | ' |
Net cash provided by (used in) financing activities | 0 | ' |
Net change in cash and cash equivalents | ' | ' |
Cash and cash equivalents - unrestricted, beginning of period | ' | ' |
Cash and cash equivalents - unrestricted, end of period | ' | ' |
Parent Guarantor [Member] | ' | ' |
Condensed Financial Statements, Captions [Line Items] | ' | ' |
Net cash provided by (used in) continuing operating activities | 235,131 | 272,882 |
Net cash provided by (used in) discontinued operating activities | ' | ' |
Net cash provided by (used in) operating activities | 235,131 | 272,882 |
Purchases of property and equipment | -6,649 | ' |
Increase in restricted cash and cash equivalents | ' | ' |
Other investing activities | ' | ' |
Net cash used in investing activities - continuing operations | -6,649 | ' |
Net cash used in investing activities - discontinued operations | ' | ' |
Net cash used in investing activities | -6,649 | ' |
Net borrowings (repayments) under credit facility | ' | ' |
Issuance of senior notes | ' | ' |
Repurchase and conversion of convertible notes | -126,541 | ' |
Early redemption of senior notes | ' | -152,180 |
Repurchase of common stock warrants | -50,775 | ' |
Deferred financing costs paid | ' | ' |
Repurchase of Company stock for retirement | ' | -100,028 |
Payment of dividend | -53,389 | -25,823 |
Proceeds from exercise of stock option and purchase plans | 2,309 | 5,145 |
Excess tax benefit from stock-based compensation | 12 | 4 |
Other financing activities, net | ' | ' |
Net cash provided by (used in) financing activities - continuing operations | -228,384 | -272,882 |
Net cash used in financing activities - discontinued operations | ' | ' |
Net cash provided by (used in) financing activities | -228,384 | -272,882 |
Net change in cash and cash equivalents | 98 | ' |
Cash and cash equivalents - unrestricted, beginning of period | ' | ' |
Cash and cash equivalents - unrestricted, end of period | 98 | ' |
Issuer [Member] | ' | ' |
Condensed Financial Statements, Captions [Line Items] | ' | ' |
Net cash provided by (used in) continuing operating activities | -174,452 | -251,957 |
Net cash provided by (used in) discontinued operating activities | ' | ' |
Net cash provided by (used in) operating activities | -174,452 | -251,957 |
Purchases of property and equipment | ' | ' |
Increase in restricted cash and cash equivalents | ' | ' |
Other investing activities | ' | ' |
Net cash used in investing activities - continuing operations | ' | ' |
Net cash used in investing activities - discontinued operations | ' | ' |
Net cash used in investing activities | ' | ' |
Net borrowings (repayments) under credit facility | 190,500 | -82,000 |
Issuance of senior notes | ' | 350,000 |
Repurchase and conversion of convertible notes | ' | ' |
Early redemption of senior notes | ' | ' |
Repurchase of common stock warrants | ' | ' |
Deferred financing costs paid | -8,158 | -15,395 |
Repurchase of Company stock for retirement | ' | ' |
Payment of dividend | ' | ' |
Proceeds from exercise of stock option and purchase plans | ' | ' |
Excess tax benefit from stock-based compensation | ' | ' |
Other financing activities, net | ' | ' |
Net cash provided by (used in) financing activities - continuing operations | 182,342 | 252,605 |
Net cash used in financing activities - discontinued operations | ' | ' |
Net cash provided by (used in) financing activities | 182,342 | 252,605 |
Net change in cash and cash equivalents | 7,890 | 648 |
Cash and cash equivalents - unrestricted, beginning of period | 714 | ' |
Cash and cash equivalents - unrestricted, end of period | 8,604 | 648 |
Guarantors [Member] | ' | ' |
Condensed Financial Statements, Captions [Line Items] | ' | ' |
Net cash provided by (used in) continuing operating activities | 35 | 1,316 |
Net cash provided by (used in) discontinued operating activities | ' | ' |
Net cash provided by (used in) operating activities | 35 | 1,316 |
Purchases of property and equipment | -7 | -721 |
Increase in restricted cash and cash equivalents | ' | ' |
Other investing activities | ' | ' |
Net cash used in investing activities - continuing operations | -7 | -721 |
Net cash used in investing activities - discontinued operations | ' | ' |
Net cash used in investing activities | -7 | -721 |
Net borrowings (repayments) under credit facility | ' | ' |
Issuance of senior notes | ' | ' |
Repurchase and conversion of convertible notes | ' | ' |
Early redemption of senior notes | ' | ' |
Repurchase of common stock warrants | ' | ' |
Deferred financing costs paid | ' | ' |
Repurchase of Company stock for retirement | ' | ' |
Payment of dividend | ' | ' |
Proceeds from exercise of stock option and purchase plans | ' | ' |
Excess tax benefit from stock-based compensation | ' | ' |
Other financing activities, net | ' | ' |
Net cash provided by (used in) financing activities - continuing operations | ' | ' |
Net cash used in financing activities - discontinued operations | ' | ' |
Net cash provided by (used in) financing activities | ' | ' |
Net change in cash and cash equivalents | 28 | 595 |
Cash and cash equivalents - unrestricted, beginning of period | ' | -595 |
Cash and cash equivalents - unrestricted, end of period | 28 | ' |
Non-Guarantors [Member] | ' | ' |
Condensed Financial Statements, Captions [Line Items] | ' | ' |
Net cash provided by (used in) continuing operating activities | 31,200 | -31,228 |
Net cash provided by (used in) discontinued operating activities | -205 | 79 |
Net cash provided by (used in) operating activities | 30,995 | -31,149 |
Purchases of property and equipment | -29,117 | -14,460 |
Increase in restricted cash and cash equivalents | 6,268 | -8,273 |
Other investing activities | 398 | 226 |
Net cash used in investing activities - continuing operations | -22,451 | -22,507 |
Net cash used in investing activities - discontinued operations | ' | ' |
Net cash used in investing activities | -22,451 | -22,507 |
Net borrowings (repayments) under credit facility | ' | ' |
Issuance of senior notes | ' | ' |
Repurchase and conversion of convertible notes | ' | ' |
Early redemption of senior notes | ' | ' |
Repurchase of common stock warrants | ' | ' |
Deferred financing costs paid | ' | ' |
Repurchase of Company stock for retirement | ' | ' |
Payment of dividend | ' | ' |
Proceeds from exercise of stock option and purchase plans | ' | ' |
Excess tax benefit from stock-based compensation | ' | ' |
Other financing activities, net | -296 | -357 |
Net cash provided by (used in) financing activities - continuing operations | -296 | -357 |
Net cash used in financing activities - discontinued operations | ' | ' |
Net cash provided by (used in) financing activities | -296 | -357 |
Net change in cash and cash equivalents | 8,248 | -54,013 |
Cash and cash equivalents - unrestricted, beginning of period | 60,865 | 97,765 |
Cash and cash equivalents - unrestricted, end of period | $69,113 | $43,752 |