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Accounting for Investments in Qualified Affordable Housing Projects - Summary of Change in Accounting Principle on Statements of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |  | 6 Months Ended
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Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2013 As Previously Reported [Member] | Dec. 31, 2013 As Previously Reported [Member] | Jun. 30, 2013 Effect of Change in Accounting Principle [Member]
Cash flows from operating activities: |  |  |  |  |  |  |
Net income | $ 11,042 | $ 9,487 | $ 22,033 | $ 19,545 | $ 19,629 |  | $ (84)
Total adjustment in net income |  |  |  | 10,397 | 10,313 |  | 84
Net cash provided by operating activities |  |  | 26,383 | 29,942 | 29,942 |  |
Cash flows from investing activities: |  |  |  |  |  |  |
Net cash used in investing activities |  |  | (82,121) | (103,814) | (103,814) |  |
Cash flows from financing activities: |  |  |  |  |  |  |
Net cash used in financing activities |  |  | 163 | (116,315) | (116,315) |  |
Net decrease in cash and cash equivalents |  |  | (55,575) | (190,187) | (190,187) |  |
Cash and cash equivalents at beginning of year |  |  | 179,357 | 268,047 | 268,047 | 179,357 |
Cash and cash equivalents at end of period | $ 123,782 | $ 77,860 | $ 123,782 | $ 77,860 | $ 77,860 | $ 179,357 |

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- Definition The sum of adjustments which are added to or deducted from net income or loss, including the portion attributable to noncontrolling interest, to reflect cash provided by or used in operating activities, in accordance with the indirect cash flow method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450594&loc=d3e33268-110906 + Details
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- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3574-108585 + Details
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