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Fair Value Measurements - Changes in Level 3 Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Investments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Beginning Balance | $ 12,954 | $ 12,482
Total Realized and Unrealized Gains (Losses) | 929 | 415
Purchases and Issuances | 1,414 | 488
Sales and Settlements | (8,898) | (442)
Transfers In (Out) | (453) | 11
Ending Balance | 5,946 | 12,954
Mortgage and Other Asset-Backed Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Beginning Balance | 40 | 16
Total Realized and Unrealized Gains (Losses) |  | (1)
Purchases and Issuances |  | 116
Sales and Settlements | (8) | (89)
Transfers In (Out) | (32) | (2)
Ending Balance |  | 40
Municipal Obligations [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Beginning Balance | 239 | 402
Total Realized and Unrealized Gains (Losses) | (3) | 21
Purchases and Issuances |  | 8
Sales and Settlements |  | (192)
Transfers In (Out) |  |
Ending Balance | 236 | 239
Interest Rate Lock Commitments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Beginning Balance |  |
Total Realized and Unrealized Gains (Losses) | 2,375 |
Purchases and Issuances |  |
Sales and Settlements |  |
Transfers In (Out) |  |
Ending Balance | 2,375 |
Total Realized and Unrealized Gains (Losses) | (3,653) |
Transfers In (Out) |  |
Ending Balance | 3,653 |
Auction Rate Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Beginning Balance | 72,118 | 68,161
Total Realized and Unrealized Gains (Losses) | (1,409) | (2,974)
Purchases and Issuances | 21,875 | 34,902
Sales and Settlements | (7,460) | (27,971)
Transfers In (Out) |  |
Ending Balance | 85,124 | 72,118
Beginning Balance | 100 | 50
Purchases and Issuances | 100 | 50
Sales and Settlements |  | (100)
Transfers In (Out) |  |
Ending Balance |  | 100
ARS Purchase Commitments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Beginning Balance | 2,647 | 2,347
Total Realized and Unrealized Gains (Losses) | 47 | (300)
Transfers In (Out) |  |
Ending Balance | $ 2,600 | $ 2,647

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- Definition Fair value assets measured on recurring basis change in realized and unrealized gain (loss) included in other income. + References No definition available. + Details
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- Definition Fair value liabilities measured on recurring basis change in realized and unrealized gain (loss) included in other income. + References No definition available. + Details
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- Definition Fair value measurement with unobservable inputs reconciliation recurring basis asset purchases sales issuances settlements. + References No definition available. + Details
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- Definition Fair value measurement with unobservable inputs reconciliation recurring basis asset sales settlements. + References No definition available. + Details
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- Definition Fair value measurement with unobservable inputs reconciliation recurring basis liabilities purchases issuances. + References No definition available. + Details
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- Definition Fair value measurement with unobservable inputs reconciliation recurring basis liabilities sales settlements. + References No definition available. + Details
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- Definition Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy. + References No definition available. + Details
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- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Amount of transfers of financial instrument classified as a liability into (out of) level 3 of the fair value hierarchy. + References No definition available. + Details
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