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Fair Value Measurements - Changes in Level 3 Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Beginning Balance | $ 544 | $ 4,402 | $ 1,222 | $ 3,653
Total Realized and Unrealized Gains (Losses) | (139) | 569 | 539 | (180)
Ending Balance | 683 | 3,833 | 683 | 3,833
Investments [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Beginning Balance | 9,149 | 8,706 | 9,508 | 5,946
Total Realized and Unrealized Gains (Losses) | (155) | 82 | (386) | (87)
Purchases and Issuances | 190 | 115 | 388 | 4,167
Sales and Settlements | (70) | (124) | (285) | (627)
Transfers In (Out) | 0 | 0 | (111) | (620)
Ending Balance | 9,114 | 8,779 | 9,114 | 8,779
Interest Rate Lock Commitments [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Beginning Balance | 11,424 | 3,038 | 7,576 | 2,375
Total Realized and Unrealized Gains (Losses) | (6,364) | 7,490 | (2,516) | 8,153
Ending Balance | 5,060 | 10,528 | 5,060 | 10,528
Auction Rate Securities [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Beginning Balance | 99,057 | 85,025 | 91,422 | 85,124
Total Realized and Unrealized Gains (Losses) | (998) | (327) | (63) | (326)
Purchases and Issuances | 2,500 | 10,975 | 10,725 | 14,175
Sales and Settlements | (175) | (3,125) | (1,700) | (6,425)
Ending Balance | 100,384 | 92,548 | 100,384 | 92,548
Auction Rate Securities Purchase Commitment [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Beginning Balance | 797 | 2,205 | 902 | 2,600
Total Realized and Unrealized Gains (Losses) | (237) | 691 | (132) | 1,086
Ending Balance | 1,034 | 1,514 | 1,034 | 1,514
Municipal Obligations [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Beginning Balance | 104 | 70 | 164 | 236
Total Realized and Unrealized Gains (Losses) | (22) | (18) | (82) | (184)
Sales and Settlements | (20) |  | (20) |
Ending Balance | $ 62 | $ 52 | $ 62 | $ 52

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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 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 Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + 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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